./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:07:05,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:07:05,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:07:05,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:07:05,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:07:05,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:07:05,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:07:05,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:07:05,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:07:05,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:07:05,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:07:05,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:07:05,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:07:05,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:07:05,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:07:05,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:07:05,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:07:05,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:07:05,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:07:05,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:07:05,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:07:05,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:07:05,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:07:05,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:07:05,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:07:05,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:07:05,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:07:05,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:07:05,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:07:05,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:07:05,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:07:05,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:07:05,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:07:05,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:07:05,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:07:05,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:07:05,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:07:05,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:07:05,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:07:05,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:07:05,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:07:05,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:07:05,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:07:05,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:07:05,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:07:05,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:07:05,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:07:05,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:07:05,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:07:05,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:07:05,848 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:07:05,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:07:05,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:07:05,849 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:07:05,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:07:05,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:07:05,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:07:05,850 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:07:05,850 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:07:05,850 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:07:05,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:07:05,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:07:05,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:07:05,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:07:05,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:07:05,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:07:05,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:07:05,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:07:05,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:07:05,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:07:05,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:07:05,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:07:05,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:07:05,855 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_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2021-11-20 07:07:06,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:07:06,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:07:06,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:07:06,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:07:06,177 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:07:06,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety/test-0234-1.i [2021-11-20 07:07:06,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/29667de59/f5c316d219b84c9b857ae77c59efee92/FLAGbf092b4be [2021-11-20 07:07:06,852 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:07:06,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/sv-benchmarks/c/memsafety/test-0234-1.i [2021-11-20 07:07:06,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/29667de59/f5c316d219b84c9b857ae77c59efee92/FLAGbf092b4be [2021-11-20 07:07:07,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/29667de59/f5c316d219b84c9b857ae77c59efee92 [2021-11-20 07:07:07,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:07:07,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:07:07,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:07:07,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:07:07,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:07:07,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca56a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07, skipping insertion in model container [2021-11-20 07:07:07,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:07:07,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:07:07,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:07:07,631 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:07:07,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:07:07,758 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:07:07,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07 WrapperNode [2021-11-20 07:07:07,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:07:07,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:07:07,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:07:07,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:07:07,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,841 INFO L137 Inliner]: procedures = 188, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 203 [2021-11-20 07:07:07,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:07:07,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:07:07,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:07:07,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:07:07,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:07:07,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:07:07,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:07:07,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:07:07,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (1/1) ... [2021-11-20 07:07:07,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:07:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:07,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:07:07,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:07:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:07:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:07:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:07:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:07:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-11-20 07:07:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-11-20 07:07:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:07:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:07:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:07:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:07:07,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:07:08,101 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:07:08,102 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:07:08,621 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:07:08,635 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:07:08,635 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-20 07:07:08,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:08 BoogieIcfgContainer [2021-11-20 07:07:08,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:07:08,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:07:08,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:07:08,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:07:08,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:07:07" (1/3) ... [2021-11-20 07:07:08,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656886dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:07:08, skipping insertion in model container [2021-11-20 07:07:08,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:07" (2/3) ... [2021-11-20 07:07:08,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656886dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:07:08, skipping insertion in model container [2021-11-20 07:07:08,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:08" (3/3) ... [2021-11-20 07:07:08,668 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2021-11-20 07:07:08,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:07:08,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2021-11-20 07:07:08,721 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:07:08,728 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:07:08,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2021-11-20 07:07:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:07:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 07:07:08,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:08,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 07:07:08,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-11-20 07:07:08,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:08,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006624931] [2021-11-20 07:07:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:08,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:08,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:08,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006624931] [2021-11-20 07:07:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006624931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:08,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:08,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:07:08,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928908994] [2021-11-20 07:07:08,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:08,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:07:08,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:07:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:07:08,964 INFO L87 Difference]: Start difference. First operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:07:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:08,989 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2021-11-20 07:07:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:07:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-20 07:07:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:09,001 INFO L225 Difference]: With dead ends: 191 [2021-11-20 07:07:09,001 INFO L226 Difference]: Without dead ends: 189 [2021-11-20 07:07:09,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:07:09,007 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:09,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:07:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-20 07:07:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-20 07:07:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 107 states have (on average 1.794392523364486) internal successors, (192), 181 states have internal predecessors, (192), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:07:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2021-11-20 07:07:09,059 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 4 [2021-11-20 07:07:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:09,059 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2021-11-20 07:07:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:07:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2021-11-20 07:07:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:07:09,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:09,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:07:09,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:07:09,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash 889842618, now seen corresponding path program 1 times [2021-11-20 07:07:09,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:09,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683328630] [2021-11-20 07:07:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:09,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:09,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292676344] [2021-11-20 07:07:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:09,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:09,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:09,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:09,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:07:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:09,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:07:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:09,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:09,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:09,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683328630] [2021-11-20 07:07:09,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292676344] [2021-11-20 07:07:09,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292676344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:09,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:09,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:07:09,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297311455] [2021-11-20 07:07:09,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:09,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:07:09,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:07:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:07:09,257 INFO L87 Difference]: Start difference. First operand 189 states and 204 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:07:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:09,385 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2021-11-20 07:07:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:07:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 07:07:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:09,388 INFO L225 Difference]: With dead ends: 188 [2021-11-20 07:07:09,388 INFO L226 Difference]: Without dead ends: 188 [2021-11-20 07:07:09,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:07:09,390 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:09,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-20 07:07:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-20 07:07:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 107 states have (on average 1.7850467289719627) internal successors, (191), 180 states have internal predecessors, (191), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:07:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2021-11-20 07:07:09,409 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 6 [2021-11-20 07:07:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:09,409 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2021-11-20 07:07:09,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:07:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2021-11-20 07:07:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:07:09,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:09,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:09,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:09,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:09,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1815317712, now seen corresponding path program 1 times [2021-11-20 07:07:09,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:09,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36123531] [2021-11-20 07:07:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:09,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:09,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:09,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576197519] [2021-11-20 07:07:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:09,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:09,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:09,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:07:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:07:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:09,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-20 07:07:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:09,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:09,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36123531] [2021-11-20 07:07:09,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576197519] [2021-11-20 07:07:09,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576197519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:09,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:09,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:07:09,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195579337] [2021-11-20 07:07:09,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:09,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:07:09,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:07:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:07:09,967 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:07:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:09,976 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2021-11-20 07:07:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:07:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 07:07:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:09,978 INFO L225 Difference]: With dead ends: 187 [2021-11-20 07:07:09,979 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 07:07:09,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:07:09,980 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 0 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:09,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 341 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 60 Unchecked, 0.0s Time] [2021-11-20 07:07:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 07:07:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-11-20 07:07:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 107 states have (on average 1.7757009345794392) internal successors, (190), 179 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:07:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2021-11-20 07:07:09,996 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 7 [2021-11-20 07:07:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:09,996 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2021-11-20 07:07:09,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:07:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2021-11-20 07:07:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:07:10,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:10,000 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:10,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:10,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 07:07:10,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 508125098, now seen corresponding path program 1 times [2021-11-20 07:07:10,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:10,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267220000] [2021-11-20 07:07:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:10,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:10,246 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:10,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887232148] [2021-11-20 07:07:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:10,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:10,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:10,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:07:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:07:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:10,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:10,881 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:07:10,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:07:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:07:10,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:11,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267220000] [2021-11-20 07:07:11,009 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887232148] [2021-11-20 07:07:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887232148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:11,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:11,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-20 07:07:11,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164894970] [2021-11-20 07:07:11,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:11,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:07:11,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:07:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:07:11,012 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:07:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:11,452 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2021-11-20 07:07:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:07:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-11-20 07:07:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:11,457 INFO L225 Difference]: With dead ends: 220 [2021-11-20 07:07:11,457 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 07:07:11,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:07:11,459 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 98 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:11,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1136 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 529 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2021-11-20 07:07:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 07:07:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 186. [2021-11-20 07:07:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 107 states have (on average 1.766355140186916) internal successors, (189), 178 states have internal predecessors, (189), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:07:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2021-11-20 07:07:11,491 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 73 [2021-11-20 07:07:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:11,492 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2021-11-20 07:07:11,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:07:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2021-11-20 07:07:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:07:11,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:11,499 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:11,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:11,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:11,719 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:11,719 INFO L85 PathProgramCache]: Analyzing trace with hash 508125099, now seen corresponding path program 1 times [2021-11-20 07:07:11,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31353731] [2021-11-20 07:07:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:11,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:11,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615891157] [2021-11-20 07:07:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:11,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:11,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:07:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:07:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:12,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-20 07:07:12,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:12,872 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:07:12,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-20 07:07:12,893 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:07:12,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:07:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:07:15,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:15,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31353731] [2021-11-20 07:07:15,313 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615891157] [2021-11-20 07:07:15,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615891157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:15,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:15,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-20 07:07:15,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453324542] [2021-11-20 07:07:15,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:15,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:07:15,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:07:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=129, Unknown=1, NotChecked=0, Total=156 [2021-11-20 07:07:15,315 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:07:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:16,679 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2021-11-20 07:07:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:07:16,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-11-20 07:07:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:16,682 INFO L225 Difference]: With dead ends: 185 [2021-11-20 07:07:16,682 INFO L226 Difference]: Without dead ends: 185 [2021-11-20 07:07:16,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=42, Invalid=229, Unknown=1, NotChecked=0, Total=272 [2021-11-20 07:07:16,684 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 2 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:16,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1054 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 490 Invalid, 0 Unknown, 325 Unchecked, 0.7s Time] [2021-11-20 07:07:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-20 07:07:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-20 07:07:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 177 states have internal predecessors, (188), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:07:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2021-11-20 07:07:16,694 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 73 [2021-11-20 07:07:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2021-11-20 07:07:16,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:07:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2021-11-20 07:07:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 07:07:16,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:16,699 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:16,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:16,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:16,920 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1318052341, now seen corresponding path program 1 times [2021-11-20 07:07:16,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:16,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256679239] [2021-11-20 07:07:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:16,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:16,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:16,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072334328] [2021-11-20 07:07:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:16,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:16,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:16,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:16,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:07:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:17,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:07:17,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:17,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:17,417 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:07:17,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:07:17,587 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:07:17,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:07:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 07:07:17,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:17,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256679239] [2021-11-20 07:07:17,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072334328] [2021-11-20 07:07:17,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072334328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:17,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:17,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 07:07:17,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852669537] [2021-11-20 07:07:17,927 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:17,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:07:17,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:17,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:07:17,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:07:17,928 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:07:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:18,406 INFO L93 Difference]: Finished difference Result 225 states and 247 transitions. [2021-11-20 07:07:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:07:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-11-20 07:07:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:18,409 INFO L225 Difference]: With dead ends: 225 [2021-11-20 07:07:18,410 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 07:07:18,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:07:18,411 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 179 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:18,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1203 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 205 Unchecked, 0.4s Time] [2021-11-20 07:07:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 07:07:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 192. [2021-11-20 07:07:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.7321428571428572) internal successors, (194), 182 states have internal predecessors, (194), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:07:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 210 transitions. [2021-11-20 07:07:18,423 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 210 transitions. Word has length 75 [2021-11-20 07:07:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:18,424 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 210 transitions. [2021-11-20 07:07:18,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:07:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 210 transitions. [2021-11-20 07:07:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 07:07:18,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:18,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:18,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:07:18,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:07:18,647 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:18,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1318052340, now seen corresponding path program 1 times [2021-11-20 07:07:18,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:18,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835010153] [2021-11-20 07:07:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:18,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:18,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:18,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14936171] [2021-11-20 07:07:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:18,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:18,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:18,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:18,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:07:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:18,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:07:18,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 07:07:31,348 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:07:31,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 67 [2021-11-20 07:07:31,601 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:07:31,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-11-20 07:07:35,597 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:07:35,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 80 [2021-11-20 07:07:36,064 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:07:36,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 76 [2021-11-20 07:07:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 07:07:45,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:46,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835010153] [2021-11-20 07:07:46,591 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14936171] [2021-11-20 07:07:46,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14936171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:46,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:46,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-20 07:07:46,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147209816] [2021-11-20 07:07:46,592 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:46,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:07:46,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:07:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=263, Unknown=2, NotChecked=0, Total=306 [2021-11-20 07:07:46,594 INFO L87 Difference]: Start difference. First operand 192 states and 210 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:07:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:50,857 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2021-11-20 07:07:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:07:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-11-20 07:07:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:50,860 INFO L225 Difference]: With dead ends: 206 [2021-11-20 07:07:50,860 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 07:07:50,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=73, Invalid=477, Unknown=2, NotChecked=0, Total=552 [2021-11-20 07:07:50,862 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 1 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:50,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1375 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 1117 Unchecked, 0.1s Time] [2021-11-20 07:07:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 07:07:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-20 07:07:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 123 states have (on average 1.6747967479674797) internal successors, (206), 193 states have internal predecessors, (206), 10 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-20 07:07:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2021-11-20 07:07:50,877 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 75 [2021-11-20 07:07:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:50,881 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2021-11-20 07:07:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:07:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2021-11-20 07:07:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:07:50,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:50,890 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:50,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:07:51,107 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1725591376, now seen corresponding path program 1 times [2021-11-20 07:07:51,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848269602] [2021-11-20 07:07:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:51,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:51,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:51,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925354704] [2021-11-20 07:07:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:51,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:51,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:51,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:51,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:07:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:07:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 07:07:51,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:51,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:51,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848269602] [2021-11-20 07:07:51,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925354704] [2021-11-20 07:07:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925354704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:51,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:51,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:07:51,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601256424] [2021-11-20 07:07:51,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:51,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:07:51,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:07:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:51,434 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:07:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:51,500 INFO L93 Difference]: Finished difference Result 198 states and 216 transitions. [2021-11-20 07:07:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:51,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2021-11-20 07:07:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:51,502 INFO L225 Difference]: With dead ends: 198 [2021-11-20 07:07:51,503 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 07:07:51,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:07:51,504 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 17 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:51,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 559 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 07:07:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-20 07:07:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 183 states have internal predecessors, (195), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:07:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2021-11-20 07:07:51,511 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 76 [2021-11-20 07:07:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:51,511 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2021-11-20 07:07:51,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:07:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2021-11-20 07:07:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 07:07:51,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:51,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:51,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:51,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:51,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:07:51,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash -593996326, now seen corresponding path program 2 times [2021-11-20 07:07:51,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:51,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894842077] [2021-11-20 07:07:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:51,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:51,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:51,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070198065] [2021-11-20 07:07:51,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:07:51,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:51,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:51,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:07:52,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:07:52,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:07:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 07:07:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:52,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 07:07:52,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:07:52,610 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:07:52,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 07:07:52,635 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:07:52,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-11-20 07:07:52,970 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:07:52,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 45 [2021-11-20 07:07:53,003 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:07:53,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-20 07:07:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 108 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 07:07:59,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:59,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894842077] [2021-11-20 07:07:59,474 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070198065] [2021-11-20 07:07:59,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070198065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:59,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:59,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-20 07:07:59,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524304570] [2021-11-20 07:07:59,475 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:59,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:07:59,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:07:59,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=202, Unknown=2, NotChecked=0, Total=240 [2021-11-20 07:07:59,476 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:08:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:02,287 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2021-11-20 07:08:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:08:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2021-11-20 07:08:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:02,291 INFO L225 Difference]: With dead ends: 193 [2021-11-20 07:08:02,292 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 07:08:02,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=64, Invalid=395, Unknown=3, NotChecked=0, Total=462 [2021-11-20 07:08:02,293 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 2 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:02,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1176 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 786 Invalid, 0 Unknown, 185 Unchecked, 0.6s Time] [2021-11-20 07:08:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 07:08:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-20 07:08:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 113 states have (on average 1.7168141592920354) internal successors, (194), 183 states have internal predecessors, (194), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:08:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 210 transitions. [2021-11-20 07:08:02,301 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 210 transitions. Word has length 81 [2021-11-20 07:08:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:02,301 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 210 transitions. [2021-11-20 07:08:02,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:08:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 210 transitions. [2021-11-20 07:08:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:08:02,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:02,303 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:02,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 07:08:02,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:02,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1234016942, now seen corresponding path program 1 times [2021-11-20 07:08:02,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880144098] [2021-11-20 07:08:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:02,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:02,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:02,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795587455] [2021-11-20 07:08:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:02,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:02,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:02,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:02,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:08:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:08:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 07:08:02,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:02,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880144098] [2021-11-20 07:08:02,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:02,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795587455] [2021-11-20 07:08:02,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795587455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:02,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:02,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:08:02,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335622438] [2021-11-20 07:08:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:02,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:08:02,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:08:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:08:02,822 INFO L87 Difference]: Start difference. First operand 193 states and 210 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:08:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:02,948 INFO L93 Difference]: Finished difference Result 225 states and 246 transitions. [2021-11-20 07:08:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:08:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2021-11-20 07:08:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:02,951 INFO L225 Difference]: With dead ends: 225 [2021-11-20 07:08:02,951 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 07:08:02,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:08:02,952 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 100 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:02,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 252 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:08:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 07:08:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 192. [2021-11-20 07:08:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 182 states have internal predecessors, (193), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:08:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 209 transitions. [2021-11-20 07:08:02,960 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 209 transitions. Word has length 82 [2021-11-20 07:08:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:02,961 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 209 transitions. [2021-11-20 07:08:02,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:08:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 209 transitions. [2021-11-20 07:08:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:08:02,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:02,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:02,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:03,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:03,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1234016941, now seen corresponding path program 1 times [2021-11-20 07:08:03,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:03,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373079410] [2021-11-20 07:08:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:03,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:03,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385621889] [2021-11-20 07:08:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:03,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:03,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:03,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:03,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:08:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:08:03,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 07:08:03,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:03,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 07:08:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 07:08:03,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373079410] [2021-11-20 07:08:03,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385621889] [2021-11-20 07:08:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385621889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:03,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:08:03,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 07:08:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036959963] [2021-11-20 07:08:03,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:03,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:08:03,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:03,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:08:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:08:03,784 INFO L87 Difference]: Start difference. First operand 192 states and 209 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:08:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:04,101 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2021-11-20 07:08:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:08:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-11-20 07:08:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:04,105 INFO L225 Difference]: With dead ends: 210 [2021-11-20 07:08:04,105 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 07:08:04,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:08:04,106 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 351 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:04,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1004 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:08:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 07:08:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 191. [2021-11-20 07:08:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 113 states have (on average 1.6991150442477876) internal successors, (192), 181 states have internal predecessors, (192), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:08:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 208 transitions. [2021-11-20 07:08:04,115 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 208 transitions. Word has length 82 [2021-11-20 07:08:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:04,116 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 208 transitions. [2021-11-20 07:08:04,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:08:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 208 transitions. [2021-11-20 07:08:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 07:08:04,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:04,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:04,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:04,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:04,338 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:04,338 INFO L85 PathProgramCache]: Analyzing trace with hash -479307117, now seen corresponding path program 1 times [2021-11-20 07:08:04,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:04,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170386363] [2021-11-20 07:08:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:04,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:04,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:04,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335504841] [2021-11-20 07:08:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:04,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:04,350 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:04,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:08:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:08:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 07:08:04,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:04,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:04,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170386363] [2021-11-20 07:08:04,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335504841] [2021-11-20 07:08:04,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335504841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:04,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:04,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:08:04,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535648142] [2021-11-20 07:08:04,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:04,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:08:04,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:08:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:08:04,649 INFO L87 Difference]: Start difference. First operand 191 states and 208 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:08:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:04,794 INFO L93 Difference]: Finished difference Result 223 states and 244 transitions. [2021-11-20 07:08:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:08:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 84 [2021-11-20 07:08:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:04,796 INFO L225 Difference]: With dead ends: 223 [2021-11-20 07:08:04,797 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 07:08:04,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:08:04,797 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 94 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:04,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 255 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:08:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 07:08:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 190. [2021-11-20 07:08:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 113 states have (on average 1.6902654867256637) internal successors, (191), 180 states have internal predecessors, (191), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:08:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 207 transitions. [2021-11-20 07:08:04,809 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 207 transitions. Word has length 84 [2021-11-20 07:08:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:04,810 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 207 transitions. [2021-11-20 07:08:04,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:08:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 207 transitions. [2021-11-20 07:08:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 07:08:04,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:04,811 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:04,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:05,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:08:05,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash -479307116, now seen corresponding path program 1 times [2021-11-20 07:08:05,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709974990] [2021-11-20 07:08:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:05,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:05,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062543007] [2021-11-20 07:08:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:05,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:05,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:05,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:08:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:08:05,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 07:08:05,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:05,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:05,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709974990] [2021-11-20 07:08:05,343 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:05,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062543007] [2021-11-20 07:08:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062543007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:05,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:05,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:08:05,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143539241] [2021-11-20 07:08:05,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:05,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:08:05,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:08:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:08:05,345 INFO L87 Difference]: Start difference. First operand 190 states and 207 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:08:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:05,439 INFO L93 Difference]: Finished difference Result 197 states and 218 transitions. [2021-11-20 07:08:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:08:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 84 [2021-11-20 07:08:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:05,441 INFO L225 Difference]: With dead ends: 197 [2021-11-20 07:08:05,441 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 07:08:05,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:08:05,442 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 160 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:05,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 191 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:08:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 07:08:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 189. [2021-11-20 07:08:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 113 states have (on average 1.6814159292035398) internal successors, (190), 179 states have internal predecessors, (190), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:08:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 206 transitions. [2021-11-20 07:08:05,450 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 206 transitions. Word has length 84 [2021-11-20 07:08:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:05,450 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 206 transitions. [2021-11-20 07:08:05,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:08:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 206 transitions. [2021-11-20 07:08:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:08:05,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:05,452 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:05,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:05,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:08:05,663 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2027015675, now seen corresponding path program 1 times [2021-11-20 07:08:05,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:05,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569748220] [2021-11-20 07:08:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:05,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:05,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:05,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986049837] [2021-11-20 07:08:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:05,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:05,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:05,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:05,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:08:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:08:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:08:06,074 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:08:06,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:08:06,227 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:08:06,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:08:06,333 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:08:06,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:08:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 07:08:06,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:06,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569748220] [2021-11-20 07:08:06,884 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986049837] [2021-11-20 07:08:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986049837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:06,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 07:08:06,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406820264] [2021-11-20 07:08:06,885 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:08:06,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:08:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:08:06,886 INFO L87 Difference]: Start difference. First operand 189 states and 206 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:08:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:07,237 INFO L93 Difference]: Finished difference Result 245 states and 273 transitions. [2021-11-20 07:08:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:08:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-11-20 07:08:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:07,239 INFO L225 Difference]: With dead ends: 245 [2021-11-20 07:08:07,240 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 07:08:07,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:08:07,241 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 156 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:07,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1277 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 533 Invalid, 0 Unknown, 189 Unchecked, 0.3s Time] [2021-11-20 07:08:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 07:08:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-11-20 07:08:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 132 states have (on average 1.6136363636363635) internal successors, (213), 198 states have internal predecessors, (213), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:08:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2021-11-20 07:08:07,250 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 88 [2021-11-20 07:08:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:07,251 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2021-11-20 07:08:07,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:08:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2021-11-20 07:08:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:08:07,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:07,263 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:07,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:08:07,476 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2027015676, now seen corresponding path program 1 times [2021-11-20 07:08:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353703379] [2021-11-20 07:08:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:07,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:07,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:07,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698867010] [2021-11-20 07:08:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:07,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:07,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:07,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:07,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:08:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 07:08:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:07,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 07:08:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:08:07,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 07:08:08,347 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:08:08,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:08:08,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-20 07:08:08,792 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:08:08,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 41 [2021-11-20 07:08:08,826 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:08:08,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 49 [2021-11-20 07:08:09,187 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:08:09,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2021-11-20 07:08:09,214 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 07:08:09,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 56 [2021-11-20 07:08:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 71 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:08:21,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:21,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:21,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353703379] [2021-11-20 07:08:21,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:21,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698867010] [2021-11-20 07:08:21,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698867010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:21,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:21,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 07:08:21,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713829773] [2021-11-20 07:08:21,645 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:21,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:08:21,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:08:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=475, Unknown=4, NotChecked=0, Total=552 [2021-11-20 07:08:21,647 INFO L87 Difference]: Start difference. First operand 213 states and 239 transitions. Second operand has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:08:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:24,518 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2021-11-20 07:08:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:08:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 88 [2021-11-20 07:08:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:24,520 INFO L225 Difference]: With dead ends: 232 [2021-11-20 07:08:24,521 INFO L226 Difference]: Without dead ends: 232 [2021-11-20 07:08:24,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=116, Invalid=809, Unknown=5, NotChecked=0, Total=930 [2021-11-20 07:08:24,522 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 5 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:24,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1385 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 732 Invalid, 0 Unknown, 296 Unchecked, 0.6s Time] [2021-11-20 07:08:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-20 07:08:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-11-20 07:08:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 216 states have internal predecessors, (232), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:08:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 260 transitions. [2021-11-20 07:08:24,533 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 260 transitions. Word has length 88 [2021-11-20 07:08:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:24,533 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 260 transitions. [2021-11-20 07:08:24,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:08:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 260 transitions. [2021-11-20 07:08:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 07:08:24,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:24,535 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:24,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:24,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:08:24,758 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1587023482, now seen corresponding path program 1 times [2021-11-20 07:08:24,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:24,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115773261] [2021-11-20 07:08:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:24,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:24,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:24,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747470024] [2021-11-20 07:08:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:24,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:24,795 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:24,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:08:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:08:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 07:08:25,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:25,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115773261] [2021-11-20 07:08:25,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747470024] [2021-11-20 07:08:25,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747470024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:25,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:25,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:08:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274076522] [2021-11-20 07:08:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:25,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:08:25,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:08:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:08:25,121 INFO L87 Difference]: Start difference. First operand 232 states and 260 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:08:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:25,314 INFO L93 Difference]: Finished difference Result 270 states and 303 transitions. [2021-11-20 07:08:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:08:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-11-20 07:08:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:25,317 INFO L225 Difference]: With dead ends: 270 [2021-11-20 07:08:25,317 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 07:08:25,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:08:25,319 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 278 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:25,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:08:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 07:08:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 231. [2021-11-20 07:08:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 149 states have (on average 1.5503355704697988) internal successors, (231), 215 states have internal predecessors, (231), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:08:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 259 transitions. [2021-11-20 07:08:25,329 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 259 transitions. Word has length 89 [2021-11-20 07:08:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:25,330 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 259 transitions. [2021-11-20 07:08:25,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:08:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 259 transitions. [2021-11-20 07:08:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 07:08:25,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:25,331 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:25,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:25,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:25,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1587023481, now seen corresponding path program 1 times [2021-11-20 07:08:25,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:25,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997093549] [2021-11-20 07:08:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:25,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:25,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:25,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159010530] [2021-11-20 07:08:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:25,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:25,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:25,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:08:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 07:08:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:26,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:08:26,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-20 07:08:26,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:08:28,262 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:08:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 59 [2021-11-20 07:08:28,291 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:08:28,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 60 [2021-11-20 07:08:29,101 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:08:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 72 [2021-11-20 07:08:29,125 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:08:29,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-11-20 07:08:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:08:42,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:43,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:43,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997093549] [2021-11-20 07:08:43,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:43,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159010530] [2021-11-20 07:08:43,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159010530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:43,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:08:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113105866] [2021-11-20 07:08:43,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:43,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:08:43,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:08:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=445, Unknown=2, NotChecked=0, Total=506 [2021-11-20 07:08:43,073 INFO L87 Difference]: Start difference. First operand 231 states and 259 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:08:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:44,499 INFO L93 Difference]: Finished difference Result 277 states and 330 transitions. [2021-11-20 07:08:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:08:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 89 [2021-11-20 07:08:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:44,502 INFO L225 Difference]: With dead ends: 277 [2021-11-20 07:08:44,502 INFO L226 Difference]: Without dead ends: 277 [2021-11-20 07:08:44,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=100, Invalid=768, Unknown=2, NotChecked=0, Total=870 [2021-11-20 07:08:44,504 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 3 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:44,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1589 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 940 Unchecked, 0.1s Time] [2021-11-20 07:08:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-20 07:08:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 268. [2021-11-20 07:08:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 181 states have (on average 1.4806629834254144) internal successors, (268), 246 states have internal predecessors, (268), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (35), 19 states have call predecessors, (35), 18 states have call successors, (35) [2021-11-20 07:08:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 321 transitions. [2021-11-20 07:08:44,518 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 321 transitions. Word has length 89 [2021-11-20 07:08:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:44,519 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 321 transitions. [2021-11-20 07:08:44,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:08:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 321 transitions. [2021-11-20 07:08:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:08:44,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:44,521 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:44,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:44,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:08:44,738 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:08:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -219536253, now seen corresponding path program 2 times [2021-11-20 07:08:44,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:44,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919438118] [2021-11-20 07:08:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:44,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:44,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:44,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539004082] [2021-11-20 07:08:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:08:44,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:44,752 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:44,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:08:45,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:08:45,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:08:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 07:08:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:45,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:08:45,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-20 07:08:45,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:09:05,544 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:09:05,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 79 [2021-11-20 07:09:05,708 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:09:05,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 80 [2021-11-20 07:09:10,812 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:09:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 92 [2021-11-20 07:09:10,965 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:09:10,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 88 [2021-11-20 07:09:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:09:31,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:33,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:33,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919438118] [2021-11-20 07:09:33,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:33,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539004082] [2021-11-20 07:09:33,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539004082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:33,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:09:33,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-20 07:09:33,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106442123] [2021-11-20 07:09:33,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:33,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:09:33,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:09:33,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=488, Unknown=2, NotChecked=0, Total=552 [2021-11-20 07:09:33,762 INFO L87 Difference]: Start difference. First operand 268 states and 321 transitions. Second operand has 21 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:09:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:39,036 INFO L93 Difference]: Finished difference Result 315 states and 402 transitions. [2021-11-20 07:09:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:09:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 90 [2021-11-20 07:09:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:39,041 INFO L225 Difference]: With dead ends: 315 [2021-11-20 07:09:39,041 INFO L226 Difference]: Without dead ends: 315 [2021-11-20 07:09:39,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=110, Invalid=880, Unknown=2, NotChecked=0, Total=992 [2021-11-20 07:09:39,043 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 3 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:39,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1943 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 1245 Unchecked, 0.2s Time] [2021-11-20 07:09:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-20 07:09:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 269. [2021-11-20 07:09:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 247 states have internal predecessors, (270), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (35), 19 states have call predecessors, (35), 18 states have call successors, (35) [2021-11-20 07:09:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 323 transitions. [2021-11-20 07:09:39,061 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 323 transitions. Word has length 90 [2021-11-20 07:09:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:39,062 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 323 transitions. [2021-11-20 07:09:39,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:09:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 323 transitions. [2021-11-20 07:09:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 07:09:39,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:39,064 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:39,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-20 07:09:39,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:09:39,279 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:09:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash -777105145, now seen corresponding path program 3 times [2021-11-20 07:09:39,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:39,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10758295] [2021-11-20 07:09:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:39,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:39,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:39,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820593630] [2021-11-20 07:09:39,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:09:39,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:39,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:39,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:09:39,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 07:09:39,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:09:39,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:09:39,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 07:09:39,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 07:09:40,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10758295] [2021-11-20 07:09:40,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820593630] [2021-11-20 07:09:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820593630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:40,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:09:40,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:09:40,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66116352] [2021-11-20 07:09:40,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:40,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:09:40,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:09:40,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:09:40,359 INFO L87 Difference]: Start difference. First operand 269 states and 323 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:09:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:40,660 INFO L93 Difference]: Finished difference Result 293 states and 343 transitions. [2021-11-20 07:09:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:09:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 91 [2021-11-20 07:09:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:40,663 INFO L225 Difference]: With dead ends: 293 [2021-11-20 07:09:40,664 INFO L226 Difference]: Without dead ends: 283 [2021-11-20 07:09:40,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:09:40,665 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 59 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:40,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1081 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:09:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-20 07:09:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-20 07:09:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 195 states have (on average 1.4615384615384615) internal successors, (285), 260 states have internal predecessors, (285), 18 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (29), 19 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-20 07:09:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 332 transitions. [2021-11-20 07:09:40,679 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 332 transitions. Word has length 91 [2021-11-20 07:09:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:40,680 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 332 transitions. [2021-11-20 07:09:40,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:09:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 332 transitions. [2021-11-20 07:09:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 07:09:40,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:40,682 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:40,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:40,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:40,899 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:09:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 213335101, now seen corresponding path program 4 times [2021-11-20 07:09:40,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:40,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689048370] [2021-11-20 07:09:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:40,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:40,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:40,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225928195] [2021-11-20 07:09:40,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:09:40,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:40,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:40,910 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:40,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:09:41,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:09:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:09:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 07:09:41,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 07:09:41,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-20 07:09:41,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:09:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:10:01,635 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:10:01,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:10:01,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 63 [2021-11-20 07:10:13,741 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:10:13,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 82 [2021-11-20 07:10:13,902 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:10:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2021-11-20 07:10:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 176 proven. 92 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 07:10:26,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:28,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689048370] [2021-11-20 07:10:28,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225928195] [2021-11-20 07:10:28,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225928195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:28,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:28,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-20 07:10:28,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038622699] [2021-11-20 07:10:28,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:28,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:10:28,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:10:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:10:28,423 INFO L87 Difference]: Start difference. First operand 283 states and 332 transitions. Second operand has 32 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:10:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:36,919 INFO L93 Difference]: Finished difference Result 353 states and 448 transitions. [2021-11-20 07:10:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:10:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 98 [2021-11-20 07:10:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:36,923 INFO L225 Difference]: With dead ends: 353 [2021-11-20 07:10:36,923 INFO L226 Difference]: Without dead ends: 353 [2021-11-20 07:10:36,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:10:36,925 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 2 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1077 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:36,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1929 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 1077 Unchecked, 0.2s Time] [2021-11-20 07:10:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-20 07:10:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 305. [2021-11-20 07:10:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 211 states have (on average 1.4360189573459716) internal successors, (303), 278 states have internal predecessors, (303), 22 states have call successors, (22), 3 states have call predecessors, (22), 6 states have return successors, (56), 23 states have call predecessors, (56), 22 states have call successors, (56) [2021-11-20 07:10:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 381 transitions. [2021-11-20 07:10:36,950 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 381 transitions. Word has length 98 [2021-11-20 07:10:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:36,950 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 381 transitions. [2021-11-20 07:10:36,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:10:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 381 transitions. [2021-11-20 07:10:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:10:36,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:36,953 INFO L514 BasicCegarLoop]: trace histogram [16, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:36,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:37,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:37,175 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash -245234823, now seen corresponding path program 5 times [2021-11-20 07:10:37,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:37,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197966605] [2021-11-20 07:10:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:37,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:37,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061942161] [2021-11-20 07:10:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:10:37,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:37,193 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:37,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:10:37,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:10:37,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:10:37,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 176 proven. 3 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 07:10:37,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-20 07:10:38,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197966605] [2021-11-20 07:10:38,039 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061942161] [2021-11-20 07:10:38,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061942161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:38,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:38,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 07:10:38,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200781665] [2021-11-20 07:10:38,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:38,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:10:38,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:10:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:10:38,041 INFO L87 Difference]: Start difference. First operand 305 states and 381 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 07:10:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:38,415 INFO L93 Difference]: Finished difference Result 285 states and 322 transitions. [2021-11-20 07:10:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:10:38,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-20 07:10:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:38,417 INFO L225 Difference]: With dead ends: 285 [2021-11-20 07:10:38,417 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 07:10:38,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:10:38,419 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 67 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:38,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 918 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:10:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 07:10:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2021-11-20 07:10:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 171 states have (on average 1.4853801169590644) internal successors, (254), 237 states have internal predecessors, (254), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:10:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 282 transitions. [2021-11-20 07:10:38,429 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 282 transitions. Word has length 99 [2021-11-20 07:10:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:38,430 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 282 transitions. [2021-11-20 07:10:38,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 07:10:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 282 transitions. [2021-11-20 07:10:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 07:10:38,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:38,432 INFO L514 BasicCegarLoop]: trace histogram [34, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:38,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:38,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:38,646 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1019903623, now seen corresponding path program 6 times [2021-11-20 07:10:38,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:38,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63331472] [2021-11-20 07:10:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:38,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:38,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:38,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273726215] [2021-11-20 07:10:38,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:10:38,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:38,671 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:38,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:10:44,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 07:10:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:10:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 392 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-20 07:10:44,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 210 proven. 10 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-11-20 07:10:45,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63331472] [2021-11-20 07:10:45,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273726215] [2021-11-20 07:10:45,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273726215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:45,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:45,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-11-20 07:10:45,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877280348] [2021-11-20 07:10:45,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:45,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:10:45,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:10:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:10:45,232 INFO L87 Difference]: Start difference. First operand 254 states and 282 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:10:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:46,594 INFO L93 Difference]: Finished difference Result 270 states and 302 transitions. [2021-11-20 07:10:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:10:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 117 [2021-11-20 07:10:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:46,607 INFO L225 Difference]: With dead ends: 270 [2021-11-20 07:10:46,608 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 07:10:46,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=558, Invalid=1698, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:10:46,610 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 98 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2319 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:46,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2319 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:10:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 07:10:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-20 07:10:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 177 states have (on average 1.4689265536723164) internal successors, (260), 243 states have internal predecessors, (260), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:10:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 288 transitions. [2021-11-20 07:10:46,621 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 288 transitions. Word has length 117 [2021-11-20 07:10:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 288 transitions. [2021-11-20 07:10:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 07:10:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 288 transitions. [2021-11-20 07:10:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 07:10:46,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:46,624 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:46,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-20 07:10:46,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 07:10:46,834 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash 5213561, now seen corresponding path program 7 times [2021-11-20 07:10:46,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:46,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754270815] [2021-11-20 07:10:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:46,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:46,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976076876] [2021-11-20 07:10:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:10:46,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:46,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:46,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:46,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:10:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 07:10:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:48,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 07:10:48,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:10:49,325 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:10:49,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:10:49,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-20 07:10:49,661 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:10:49,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 07:10:49,676 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:10:49,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 07:10:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 596 proven. 224 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-20 07:10:49,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:49,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754270815] [2021-11-20 07:10:49,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976076876] [2021-11-20 07:10:49,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976076876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:49,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:49,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 07:10:49,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647616311] [2021-11-20 07:10:49,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:49,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:10:49,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:10:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:10:49,998 INFO L87 Difference]: Start difference. First operand 260 states and 288 transitions. Second operand has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:10:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:50,881 INFO L93 Difference]: Finished difference Result 441 states and 482 transitions. [2021-11-20 07:10:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:10:50,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 123 [2021-11-20 07:10:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:50,885 INFO L225 Difference]: With dead ends: 441 [2021-11-20 07:10:50,885 INFO L226 Difference]: Without dead ends: 441 [2021-11-20 07:10:50,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:10:50,886 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 177 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:50,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1033 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 831 Invalid, 0 Unknown, 196 Unchecked, 0.7s Time] [2021-11-20 07:10:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-20 07:10:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 268. [2021-11-20 07:10:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 185 states have (on average 1.4648648648648648) internal successors, (271), 251 states have internal predecessors, (271), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:10:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2021-11-20 07:10:50,897 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 123 [2021-11-20 07:10:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:50,897 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2021-11-20 07:10:50,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:10:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2021-11-20 07:10:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:10:50,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:50,899 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:50,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:51,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:10:51,119 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash 715265017, now seen corresponding path program 1 times [2021-11-20 07:10:51,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:51,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562180212] [2021-11-20 07:10:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:51,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:51,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705182683] [2021-11-20 07:10:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:51,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:51,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:51,137 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:51,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:10:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:10:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:10:51,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:51,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562180212] [2021-11-20 07:10:51,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705182683] [2021-11-20 07:10:51,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705182683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:51,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:51,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:10:51,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946573753] [2021-11-20 07:10:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:51,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:10:51,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:10:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:10:51,533 INFO L87 Difference]: Start difference. First operand 268 states and 299 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:10:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:51,671 INFO L93 Difference]: Finished difference Result 298 states and 332 transitions. [2021-11-20 07:10:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:10:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-11-20 07:10:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:51,674 INFO L225 Difference]: With dead ends: 298 [2021-11-20 07:10:51,674 INFO L226 Difference]: Without dead ends: 298 [2021-11-20 07:10:51,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:10:51,675 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 80 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:51,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-20 07:10:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 267. [2021-11-20 07:10:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 185 states have (on average 1.4594594594594594) internal successors, (270), 250 states have internal predecessors, (270), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:10:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 298 transitions. [2021-11-20 07:10:51,686 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 298 transitions. Word has length 125 [2021-11-20 07:10:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:51,687 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 298 transitions. [2021-11-20 07:10:51,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:10:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 298 transitions. [2021-11-20 07:10:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:10:51,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:51,690 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:51,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:51,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:51,906 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 715265018, now seen corresponding path program 1 times [2021-11-20 07:10:51,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778666063] [2021-11-20 07:10:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:51,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:51,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975626554] [2021-11-20 07:10:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:51,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:51,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:51,926 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:51,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:10:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:10:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:10:52,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:52,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778666063] [2021-11-20 07:10:52,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975626554] [2021-11-20 07:10:52,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975626554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:52,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:52,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:10:52,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90618183] [2021-11-20 07:10:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:52,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:10:52,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:10:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:10:52,285 INFO L87 Difference]: Start difference. First operand 267 states and 298 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:10:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:52,424 INFO L93 Difference]: Finished difference Result 272 states and 306 transitions. [2021-11-20 07:10:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:10:52,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-11-20 07:10:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:52,426 INFO L225 Difference]: With dead ends: 272 [2021-11-20 07:10:52,426 INFO L226 Difference]: Without dead ends: 272 [2021-11-20 07:10:52,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:10:52,426 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 146 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:52,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 196 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-20 07:10:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2021-11-20 07:10:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 185 states have (on average 1.454054054054054) internal successors, (269), 249 states have internal predecessors, (269), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:10:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 297 transitions. [2021-11-20 07:10:52,436 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 297 transitions. Word has length 125 [2021-11-20 07:10:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:52,437 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 297 transitions. [2021-11-20 07:10:52,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:10:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 297 transitions. [2021-11-20 07:10:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 07:10:52,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:52,439 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:52,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:52,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:10:52,655 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash 589871585, now seen corresponding path program 1 times [2021-11-20 07:10:52,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:52,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528245610] [2021-11-20 07:10:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:52,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:52,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:52,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299737731] [2021-11-20 07:10:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:52,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:52,669 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:52,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:10:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 07:10:52,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:52,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:10:53,120 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:10:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:10:53,294 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:10:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:10:54,124 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:10:54,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-20 07:10:54,961 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:10:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-20 07:10:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 428 proven. 420 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-20 07:10:56,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:56,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528245610] [2021-11-20 07:10:56,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299737731] [2021-11-20 07:10:56,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299737731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:56,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:56,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:10:56,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836942774] [2021-11-20 07:10:56,917 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:56,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:10:56,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:56,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:10:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:10:56,920 INFO L87 Difference]: Start difference. First operand 266 states and 297 transitions. Second operand has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:10:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:58,117 INFO L93 Difference]: Finished difference Result 373 states and 430 transitions. [2021-11-20 07:10:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:10:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 129 [2021-11-20 07:10:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:58,121 INFO L225 Difference]: With dead ends: 373 [2021-11-20 07:10:58,121 INFO L226 Difference]: Without dead ends: 373 [2021-11-20 07:10:58,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:10:58,123 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 92 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:58,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1389 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 613 Invalid, 0 Unknown, 213 Unchecked, 0.4s Time] [2021-11-20 07:10:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-20 07:10:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 341. [2021-11-20 07:10:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 248 states have (on average 1.403225806451613) internal successors, (348), 313 states have internal predecessors, (348), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:10:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 400 transitions. [2021-11-20 07:10:58,137 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 400 transitions. Word has length 129 [2021-11-20 07:10:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:58,138 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 400 transitions. [2021-11-20 07:10:58,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:10:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 400 transitions. [2021-11-20 07:10:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 07:10:58,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:58,140 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:58,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:58,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:10:58,367 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:10:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash 589871586, now seen corresponding path program 1 times [2021-11-20 07:10:58,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392299009] [2021-11-20 07:10:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:58,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:58,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:58,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345346562] [2021-11-20 07:10:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:58,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:58,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:58,385 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:58,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:11:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 147 conjunts are in the unsatisfiable core [2021-11-20 07:11:01,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:01,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 07:11:01,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:11:01,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 07:11:01,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:11:18,331 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:11:18,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:11:18,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 74 [2021-11-20 07:11:31,020 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:11:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:11:31,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 74 [2021-11-20 07:11:41,440 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:11:41,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:11:41,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 74 [2021-11-20 07:11:54,608 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:11:54,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 123 [2021-11-20 07:11:54,736 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:11:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 126 [2021-11-20 07:12:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 311 proven. 550 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-20 07:12:28,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:29,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392299009] [2021-11-20 07:12:29,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345346562] [2021-11-20 07:12:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345346562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:29,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:29,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-20 07:12:29,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56574192] [2021-11-20 07:12:29,610 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:29,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 07:12:29,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 07:12:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1067, Unknown=3, NotChecked=0, Total=1190 [2021-11-20 07:12:29,612 INFO L87 Difference]: Start difference. First operand 341 states and 400 transitions. Second operand has 33 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:12:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:41,579 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2021-11-20 07:12:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:12:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 129 [2021-11-20 07:12:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:41,582 INFO L225 Difference]: With dead ends: 384 [2021-11-20 07:12:41,583 INFO L226 Difference]: Without dead ends: 384 [2021-11-20 07:12:41,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=202, Invalid=2051, Unknown=3, NotChecked=0, Total=2256 [2021-11-20 07:12:41,585 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 5 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:41,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1639 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 1120 Unchecked, 0.2s Time] [2021-11-20 07:12:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-20 07:12:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 375. [2021-11-20 07:12:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 277 states have (on average 1.371841155234657) internal successors, (380), 342 states have internal predecessors, (380), 30 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (49), 29 states have call predecessors, (49), 30 states have call successors, (49) [2021-11-20 07:12:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 459 transitions. [2021-11-20 07:12:41,603 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 459 transitions. Word has length 129 [2021-11-20 07:12:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:41,603 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 459 transitions. [2021-11-20 07:12:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:12:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 459 transitions. [2021-11-20 07:12:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:12:41,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:41,606 INFO L514 BasicCegarLoop]: trace histogram [41, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:41,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:41,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:12:41,827 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:12:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash 838586690, now seen corresponding path program 2 times [2021-11-20 07:12:41,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:41,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258867771] [2021-11-20 07:12:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:41,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:41,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:41,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556213460] [2021-11-20 07:12:41,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:12:41,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:41,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:41,845 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:41,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:12:44,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:12:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-20 07:12:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:44,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-20 07:12:44,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:12:46,014 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:12:46,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:12:46,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-20 07:12:47,341 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:12:47,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:12:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-20 07:12:48,567 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:12:48,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-20 07:12:48,830 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:12:48,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:12:51,210 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:12:51,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 75 [2021-11-20 07:12:51,325 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:12:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 80 [2021-11-20 07:12:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 379 proven. 598 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-20 07:12:52,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:52,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258867771] [2021-11-20 07:12:52,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556213460] [2021-11-20 07:12:52,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556213460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:52,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:52,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:12:52,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080801730] [2021-11-20 07:12:52,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:52,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:12:52,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:52,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:12:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:12:52,774 INFO L87 Difference]: Start difference. First operand 375 states and 459 transitions. Second operand has 31 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:12:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:56,892 INFO L93 Difference]: Finished difference Result 383 states and 468 transitions. [2021-11-20 07:12:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:12:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 130 [2021-11-20 07:12:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:56,901 INFO L225 Difference]: With dead ends: 383 [2021-11-20 07:12:56,902 INFO L226 Difference]: Without dead ends: 383 [2021-11-20 07:12:56,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:12:56,903 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 2 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1153 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:56,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1777 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 408 Invalid, 0 Unknown, 1153 Unchecked, 1.1s Time] [2021-11-20 07:12:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-20 07:12:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 348. [2021-11-20 07:12:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 255 states have (on average 1.396078431372549) internal successors, (356), 320 states have internal predecessors, (356), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:12:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 408 transitions. [2021-11-20 07:12:56,921 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 408 transitions. Word has length 130 [2021-11-20 07:12:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:56,922 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 408 transitions. [2021-11-20 07:12:56,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:12:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 408 transitions. [2021-11-20 07:12:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:12:56,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:56,924 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:56,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:12:57,141 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:12:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1106150006, now seen corresponding path program 1 times [2021-11-20 07:12:57,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:57,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987731263] [2021-11-20 07:12:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:57,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:57,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:57,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713288659] [2021-11-20 07:12:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:57,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:57,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:57,161 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:57,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:12:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:12:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:12:57,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:12:57,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:57,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987731263] [2021-11-20 07:12:57,551 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:57,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713288659] [2021-11-20 07:12:57,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713288659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:57,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:57,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:12:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946307822] [2021-11-20 07:12:57,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:57,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:12:57,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:12:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:12:57,554 INFO L87 Difference]: Start difference. First operand 348 states and 408 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:12:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:57,702 INFO L93 Difference]: Finished difference Result 381 states and 444 transitions. [2021-11-20 07:12:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:12:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2021-11-20 07:12:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:57,704 INFO L225 Difference]: With dead ends: 381 [2021-11-20 07:12:57,704 INFO L226 Difference]: Without dead ends: 381 [2021-11-20 07:12:57,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:12:57,706 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 251 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:57,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 284 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:12:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-20 07:12:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 347. [2021-11-20 07:12:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 255 states have (on average 1.392156862745098) internal successors, (355), 319 states have internal predecessors, (355), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:12:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 407 transitions. [2021-11-20 07:12:57,718 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 407 transitions. Word has length 130 [2021-11-20 07:12:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:57,719 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 407 transitions. [2021-11-20 07:12:57,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:12:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 407 transitions. [2021-11-20 07:12:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:12:57,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:57,721 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:57,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:57,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:12:57,934 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:12:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1106150007, now seen corresponding path program 1 times [2021-11-20 07:12:57,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:57,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600082592] [2021-11-20 07:12:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:57,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:57,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878270524] [2021-11-20 07:12:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:57,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:57,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:57,946 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:57,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:12:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 07:12:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 112 proven. 196 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-20 07:12:58,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:58,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:12:58,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 07:12:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 112 proven. 196 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-20 07:12:59,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:59,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600082592] [2021-11-20 07:12:59,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878270524] [2021-11-20 07:12:59,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878270524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:59,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:59,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 07:12:59,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408552851] [2021-11-20 07:12:59,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:59,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:12:59,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:59,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:12:59,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:12:59,330 INFO L87 Difference]: Start difference. First operand 347 states and 407 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:12:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:59,724 INFO L93 Difference]: Finished difference Result 355 states and 418 transitions. [2021-11-20 07:12:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:12:59,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 130 [2021-11-20 07:12:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:59,727 INFO L225 Difference]: With dead ends: 355 [2021-11-20 07:12:59,727 INFO L226 Difference]: Without dead ends: 355 [2021-11-20 07:12:59,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:12:59,728 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 471 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:59,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1430 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:12:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-20 07:12:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 346. [2021-11-20 07:12:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 255 states have (on average 1.388235294117647) internal successors, (354), 318 states have internal predecessors, (354), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:12:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 406 transitions. [2021-11-20 07:12:59,745 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 406 transitions. Word has length 130 [2021-11-20 07:12:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:59,745 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 406 transitions. [2021-11-20 07:12:59,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:12:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 406 transitions. [2021-11-20 07:12:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 07:12:59,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:59,747 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:59,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:59,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:59,975 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:12:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2141731785, now seen corresponding path program 1 times [2021-11-20 07:12:59,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:59,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673071694] [2021-11-20 07:12:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:59,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:59,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759745456] [2021-11-20 07:12:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:59,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:00,003 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:00,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:13:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:13:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:13:00,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:13:00,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673071694] [2021-11-20 07:13:00,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:13:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759745456] [2021-11-20 07:13:00,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759745456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:00,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:00,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:13:00,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203715189] [2021-11-20 07:13:00,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:00,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:13:00,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:13:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:13:00,388 INFO L87 Difference]: Start difference. First operand 346 states and 406 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:13:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:00,509 INFO L93 Difference]: Finished difference Result 374 states and 436 transitions. [2021-11-20 07:13:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:13:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2021-11-20 07:13:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:00,511 INFO L225 Difference]: With dead ends: 374 [2021-11-20 07:13:00,511 INFO L226 Difference]: Without dead ends: 374 [2021-11-20 07:13:00,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:13:00,512 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 64 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:00,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-20 07:13:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 345. [2021-11-20 07:13:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 255 states have (on average 1.384313725490196) internal successors, (353), 317 states have internal predecessors, (353), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:13:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 405 transitions. [2021-11-20 07:13:00,524 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 405 transitions. Word has length 132 [2021-11-20 07:13:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:00,525 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 405 transitions. [2021-11-20 07:13:00,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:13:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 405 transitions. [2021-11-20 07:13:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 07:13:00,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:00,527 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:00,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:00,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:13:00,755 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:13:00,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2141731784, now seen corresponding path program 1 times [2021-11-20 07:13:00,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:00,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060439695] [2021-11-20 07:13:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:00,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:00,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850413967] [2021-11-20 07:13:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:00,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:00,772 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:00,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:13:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:00,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:13:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:13:01,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:13:01,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:01,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060439695] [2021-11-20 07:13:01,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:13:01,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850413967] [2021-11-20 07:13:01,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850413967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:01,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:01,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:13:01,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363618513] [2021-11-20 07:13:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:01,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:13:01,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:13:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:13:01,244 INFO L87 Difference]: Start difference. First operand 345 states and 405 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:13:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:01,417 INFO L93 Difference]: Finished difference Result 348 states and 410 transitions. [2021-11-20 07:13:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:13:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2021-11-20 07:13:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:01,421 INFO L225 Difference]: With dead ends: 348 [2021-11-20 07:13:01,421 INFO L226 Difference]: Without dead ends: 348 [2021-11-20 07:13:01,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:13:01,422 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:01,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 202 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:13:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-20 07:13:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-11-20 07:13:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 255 states have (on average 1.380392156862745) internal successors, (352), 316 states have internal predecessors, (352), 26 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 07:13:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 404 transitions. [2021-11-20 07:13:01,434 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 404 transitions. Word has length 132 [2021-11-20 07:13:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:01,435 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 404 transitions. [2021-11-20 07:13:01,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:13:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 404 transitions. [2021-11-20 07:13:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 07:13:01,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:01,437 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:01,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:01,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:01,651 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:13:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1241149599, now seen corresponding path program 1 times [2021-11-20 07:13:01,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:01,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432951954] [2021-11-20 07:13:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:01,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:01,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:01,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784026864] [2021-11-20 07:13:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:01,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:01,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:01,667 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:01,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:13:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 07:13:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:01,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:13:02,120 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:13:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:13:02,290 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:13:02,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:13:02,458 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:13:02,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 34 [2021-11-20 07:13:02,706 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 07:13:02,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 42 [2021-11-20 07:13:02,875 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 07:13:02,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 42 [2021-11-20 07:13:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 117 proven. 728 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-20 07:13:03,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:03,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:03,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432951954] [2021-11-20 07:13:03,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:13:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784026864] [2021-11-20 07:13:03,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784026864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:03,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:13:03,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-20 07:13:03,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081862517] [2021-11-20 07:13:03,547 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:03,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:13:03,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:13:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:13:03,548 INFO L87 Difference]: Start difference. First operand 344 states and 404 transitions. Second operand has 21 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:13:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:03,907 INFO L93 Difference]: Finished difference Result 540 states and 658 transitions. [2021-11-20 07:13:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:13:03,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 136 [2021-11-20 07:13:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:03,911 INFO L225 Difference]: With dead ends: 540 [2021-11-20 07:13:03,911 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 07:13:03,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:13:03,912 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 71 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:03,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1618 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 494 Invalid, 0 Unknown, 357 Unchecked, 0.3s Time] [2021-11-20 07:13:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 07:13:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 511. [2021-11-20 07:13:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 397 states have (on average 1.3350125944584383) internal successors, (530), 460 states have internal predecessors, (530), 51 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-20 07:13:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 632 transitions. [2021-11-20 07:13:03,929 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 632 transitions. Word has length 136 [2021-11-20 07:13:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:03,930 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 632 transitions. [2021-11-20 07:13:03,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:13:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 632 transitions. [2021-11-20 07:13:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 07:13:03,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:03,932 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:03,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:04,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:04,147 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:13:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1241149600, now seen corresponding path program 1 times [2021-11-20 07:13:04,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:04,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240589642] [2021-11-20 07:13:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:04,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:04,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729841944] [2021-11-20 07:13:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:04,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:04,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:04,165 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:04,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:13:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-20 07:13:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:06,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 07:13:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 07:13:07,577 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:13:07,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 07:13:07,627 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:13:07,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:13:08,031 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:13:08,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 07:13:08,096 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:13:08,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:13:08,567 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:13:08,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 07:13:08,649 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:13:08,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:13:09,406 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:13:09,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 71 [2021-11-20 07:13:09,476 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-11-20 07:13:09,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 68 treesize of output 93 [2021-11-20 07:13:10,395 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:13:10,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 96 [2021-11-20 07:13:10,453 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-20 07:13:10,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 98 [2021-11-20 07:13:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 6 proven. 728 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-11-20 07:13:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:28,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240589642] [2021-11-20 07:13:28,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:13:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729841944] [2021-11-20 07:13:28,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729841944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:28,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:13:28,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-20 07:13:28,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922070404] [2021-11-20 07:13:28,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:28,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:13:28,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:13:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=648, Unknown=8, NotChecked=0, Total=756 [2021-11-20 07:13:28,095 INFO L87 Difference]: Start difference. First operand 511 states and 632 transitions. Second operand has 26 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:13:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:29,402 INFO L93 Difference]: Finished difference Result 662 states and 793 transitions. [2021-11-20 07:13:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:13:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 136 [2021-11-20 07:13:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:29,406 INFO L225 Difference]: With dead ends: 662 [2021-11-20 07:13:29,406 INFO L226 Difference]: Without dead ends: 662 [2021-11-20 07:13:29,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=135, Invalid=979, Unknown=8, NotChecked=0, Total=1122 [2021-11-20 07:13:29,407 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 157 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1091 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:29,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1655 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1000 Invalid, 0 Unknown, 1091 Unchecked, 0.9s Time] [2021-11-20 07:13:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-20 07:13:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 521. [2021-11-20 07:13:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.3341523341523343) internal successors, (543), 470 states have internal predecessors, (543), 51 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-20 07:13:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 645 transitions. [2021-11-20 07:13:29,423 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 645 transitions. Word has length 136 [2021-11-20 07:13:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:29,424 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 645 transitions. [2021-11-20 07:13:29,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:13:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 645 transitions. [2021-11-20 07:13:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 07:13:29,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:29,426 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:29,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:29,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 07:13:29,643 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:13:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:29,643 INFO L85 PathProgramCache]: Analyzing trace with hash -179068018, now seen corresponding path program 1 times [2021-11-20 07:13:29,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:29,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995745375] [2021-11-20 07:13:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:29,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:29,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:29,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126529255] [2021-11-20 07:13:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:29,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:29,654 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:13:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:13:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:13:30,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:13:30,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995745375] [2021-11-20 07:13:30,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:13:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126529255] [2021-11-20 07:13:30,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126529255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:30,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:30,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:13:30,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252401426] [2021-11-20 07:13:30,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:30,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:13:30,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:13:30,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:13:30,116 INFO L87 Difference]: Start difference. First operand 521 states and 645 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:13:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:30,273 INFO L93 Difference]: Finished difference Result 549 states and 673 transitions. [2021-11-20 07:13:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:13:30,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 137 [2021-11-20 07:13:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:30,277 INFO L225 Difference]: With dead ends: 549 [2021-11-20 07:13:30,277 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 07:13:30,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:13:30,278 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 221 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:30,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 281 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 07:13:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 520. [2021-11-20 07:13:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.3292383292383292) internal successors, (541), 469 states have internal predecessors, (541), 51 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-20 07:13:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 643 transitions. [2021-11-20 07:13:30,294 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 643 transitions. Word has length 137 [2021-11-20 07:13:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:30,295 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 643 transitions. [2021-11-20 07:13:30,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:13:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 643 transitions. [2021-11-20 07:13:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 07:13:30,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:30,297 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:30,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:30,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 07:13:30,511 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:13:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -179068017, now seen corresponding path program 1 times [2021-11-20 07:13:30,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:30,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098562611] [2021-11-20 07:13:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:30,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:30,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610673519] [2021-11-20 07:13:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:30,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:30,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:30,529 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:30,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:13:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:34,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-20 07:13:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:34,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 07:13:34,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 07:13:34,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:13:35,546 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:13:35,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 07:13:35,597 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:13:35,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:13:36,005 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:13:36,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 07:13:36,091 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:13:36,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:13:36,636 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:13:36,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2021-11-20 07:13:36,684 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:13:36,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 69 [2021-11-20 07:13:37,266 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:13:37,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 75 [2021-11-20 07:13:37,310 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:13:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 75 [2021-11-20 07:13:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 311 proven. 634 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-20 07:13:41,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:41,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098562611] [2021-11-20 07:13:41,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:13:41,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610673519] [2021-11-20 07:13:41,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610673519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:41,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:13:41,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 07:13:41,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8535400] [2021-11-20 07:13:41,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:41,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:13:41,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:13:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:13:41,998 INFO L87 Difference]: Start difference. First operand 520 states and 643 transitions. Second operand has 24 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 20 states have internal predecessors, (84), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:13:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:43,233 INFO L93 Difference]: Finished difference Result 564 states and 691 transitions. [2021-11-20 07:13:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:13:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 20 states have internal predecessors, (84), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 137 [2021-11-20 07:13:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:43,237 INFO L225 Difference]: With dead ends: 564 [2021-11-20 07:13:43,238 INFO L226 Difference]: Without dead ends: 564 [2021-11-20 07:13:43,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:13:43,239 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 9 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:43,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1470 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 691 Invalid, 0 Unknown, 343 Unchecked, 0.8s Time] [2021-11-20 07:13:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-20 07:13:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 562. [2021-11-20 07:13:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 445 states have (on average 1.3101123595505617) internal successors, (583), 509 states have internal predecessors, (583), 53 states have call successors, (53), 5 states have call predecessors, (53), 5 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-20 07:13:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 689 transitions. [2021-11-20 07:13:43,257 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 689 transitions. Word has length 137 [2021-11-20 07:13:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:43,258 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 689 transitions. [2021-11-20 07:13:43,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 20 states have internal predecessors, (84), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:13:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 689 transitions. [2021-11-20 07:13:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 07:13:43,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:43,260 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:43,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:43,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 07:13:43,483 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:13:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash -408725512, now seen corresponding path program 1 times [2021-11-20 07:13:43,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:43,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422986974] [2021-11-20 07:13:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:43,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:43,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548624788] [2021-11-20 07:13:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:43,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:43,497 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:43,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 07:13:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-20 07:13:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:44,014 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:13:44,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-20 07:13:44,083 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:13:44,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:13:44,497 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:13:44,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 41 [2021-11-20 07:13:44,528 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:13:44,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 49 [2021-11-20 07:13:45,000 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:13:45,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 64 [2021-11-20 07:13:45,052 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:13:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 64 [2021-11-20 07:13:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:45,179 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 07:13:45,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 60 [2021-11-20 07:13:46,072 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:13:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 77 [2021-11-20 07:13:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:46,154 INFO L354 Elim1Store]: treesize reduction 94, result has 23.0 percent of original size [2021-11-20 07:13:46,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 59 treesize of output 80 [2021-11-20 07:13:46,375 INFO L354 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2021-11-20 07:13:46,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 59 treesize of output 84 [2021-11-20 07:13:47,520 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:13:47,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 90 [2021-11-20 07:13:47,625 INFO L354 Elim1Store]: treesize reduction 146, result has 24.0 percent of original size [2021-11-20 07:13:47,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 72 treesize of output 104 [2021-11-20 07:13:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:13:47,896 INFO L354 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2021-11-20 07:13:47,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 100 [2021-11-20 07:13:49,188 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:13:49,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2021-11-20 07:13:49,256 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-20 07:13:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 101 [2021-11-20 07:14:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 168 proven. 476 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-11-20 07:14:09,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:10,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422986974] [2021-11-20 07:14:10,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548624788] [2021-11-20 07:14:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548624788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:10,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:14:10,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-20 07:14:10,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587809821] [2021-11-20 07:14:10,466 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:14:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:14:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=943, Unknown=3, NotChecked=0, Total=1190 [2021-11-20 07:14:10,468 INFO L87 Difference]: Start difference. First operand 562 states and 689 transitions. Second operand has 28 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 21 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:10,850 INFO L93 Difference]: Finished difference Result 632 states and 772 transitions. [2021-11-20 07:14:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:14:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 21 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 143 [2021-11-20 07:14:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:10,858 INFO L225 Difference]: With dead ends: 632 [2021-11-20 07:14:10,858 INFO L226 Difference]: Without dead ends: 632 [2021-11-20 07:14:10,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=265, Invalid=1138, Unknown=3, NotChecked=0, Total=1406 [2021-11-20 07:14:10,859 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 9 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:10,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1977 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 1177 Unchecked, 0.2s Time] [2021-11-20 07:14:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-20 07:14:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2021-11-20 07:14:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 502 states have (on average 1.2868525896414342) internal successors, (646), 568 states have internal predecessors, (646), 61 states have call successors, (61), 6 states have call predecessors, (61), 6 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-20 07:14:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 768 transitions. [2021-11-20 07:14:10,875 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 768 transitions. Word has length 143 [2021-11-20 07:14:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:10,875 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 768 transitions. [2021-11-20 07:14:10,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 21 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 768 transitions. [2021-11-20 07:14:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 07:14:10,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:10,877 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:10,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:11,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 07:14:11,091 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:11,091 INFO L85 PathProgramCache]: Analyzing trace with hash -408725513, now seen corresponding path program 1 times [2021-11-20 07:14:11,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:11,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772505621] [2021-11-20 07:14:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:11,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:11,101 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183462801] [2021-11-20 07:14:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:11,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:11,103 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:11,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 07:14:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:14:11,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:11,447 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:14:11,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:14:11,616 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:14:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:14:11,768 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:14:11,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:14:11,904 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:14:11,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:14:12,019 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:14:12,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:14:12,147 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:14:12,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:14:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-20 07:14:12,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:13,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772505621] [2021-11-20 07:14:13,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183462801] [2021-11-20 07:14:13,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183462801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:13,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:14:13,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-20 07:14:13,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924654685] [2021-11-20 07:14:13,573 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:13,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:14:13,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:13,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:14:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:14:13,574 INFO L87 Difference]: Start difference. First operand 628 states and 768 transitions. Second operand has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:13,748 INFO L93 Difference]: Finished difference Result 960 states and 1218 transitions. [2021-11-20 07:14:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:14:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 143 [2021-11-20 07:14:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:13,756 INFO L225 Difference]: With dead ends: 960 [2021-11-20 07:14:13,757 INFO L226 Difference]: Without dead ends: 960 [2021-11-20 07:14:13,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 239 SyntacticMatches, 19 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:14:13,758 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 49 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:13,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 700 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2021-11-20 07:14:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-11-20 07:14:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 951. [2021-11-20 07:14:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 778 states have (on average 1.2853470437017995) internal successors, (1000), 850 states have internal predecessors, (1000), 108 states have call successors, (108), 6 states have call predecessors, (108), 6 states have return successors, (108), 94 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 07:14:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1216 transitions. [2021-11-20 07:14:13,784 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1216 transitions. Word has length 143 [2021-11-20 07:14:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:13,785 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1216 transitions. [2021-11-20 07:14:13,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1216 transitions. [2021-11-20 07:14:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 07:14:13,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:13,787 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:13,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:14,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:14,003 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash 214411084, now seen corresponding path program 1 times [2021-11-20 07:14:14,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:14,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209692599] [2021-11-20 07:14:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:14,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:14,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081031391] [2021-11-20 07:14:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:14,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:14,014 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:14,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 07:14:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:14,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:14:14,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:14,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:14,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209692599] [2021-11-20 07:14:14,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081031391] [2021-11-20 07:14:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081031391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:14,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:14,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:14:14,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332799969] [2021-11-20 07:14:14,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:14,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:14:14,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:14:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:14:14,548 INFO L87 Difference]: Start difference. First operand 951 states and 1216 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:14,711 INFO L93 Difference]: Finished difference Result 974 states and 1238 transitions. [2021-11-20 07:14:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:14:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 144 [2021-11-20 07:14:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:14,716 INFO L225 Difference]: With dead ends: 974 [2021-11-20 07:14:14,716 INFO L226 Difference]: Without dead ends: 974 [2021-11-20 07:14:14,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:14,716 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 197 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:14,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 280 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:14:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-20 07:14:14,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 949. [2021-11-20 07:14:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 778 states have (on average 1.281491002570694) internal successors, (997), 848 states have internal predecessors, (997), 108 states have call successors, (108), 6 states have call predecessors, (108), 6 states have return successors, (108), 94 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 07:14:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1213 transitions. [2021-11-20 07:14:14,739 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1213 transitions. Word has length 144 [2021-11-20 07:14:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:14,739 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1213 transitions. [2021-11-20 07:14:14,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1213 transitions. [2021-11-20 07:14:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 07:14:14,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:14,741 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:14,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:14,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 07:14:14,955 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:14,955 INFO L85 PathProgramCache]: Analyzing trace with hash 214411085, now seen corresponding path program 1 times [2021-11-20 07:14:14,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:14,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654403192] [2021-11-20 07:14:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:14,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:14,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:14,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815578016] [2021-11-20 07:14:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:14,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:14,966 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:14,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 07:14:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:15,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 07:14:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-20 07:14:15,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:15,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:14:15,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 07:14:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-20 07:14:16,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:16,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654403192] [2021-11-20 07:14:16,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:16,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815578016] [2021-11-20 07:14:16,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815578016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:16,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:16,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 07:14:16,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619930668] [2021-11-20 07:14:16,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:16,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:14:16,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:16,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:14:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:14:16,726 INFO L87 Difference]: Start difference. First operand 949 states and 1213 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 07:14:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:17,055 INFO L93 Difference]: Finished difference Result 948 states and 1212 transitions. [2021-11-20 07:14:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:14:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 144 [2021-11-20 07:14:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:17,062 INFO L225 Difference]: With dead ends: 948 [2021-11-20 07:14:17,062 INFO L226 Difference]: Without dead ends: 948 [2021-11-20 07:14:17,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:14:17,063 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 427 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:17,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 951 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:14:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-20 07:14:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 948. [2021-11-20 07:14:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 778 states have (on average 1.2802056555269923) internal successors, (996), 847 states have internal predecessors, (996), 108 states have call successors, (108), 6 states have call predecessors, (108), 6 states have return successors, (108), 94 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 07:14:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1212 transitions. [2021-11-20 07:14:17,087 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1212 transitions. Word has length 144 [2021-11-20 07:14:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:17,088 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1212 transitions. [2021-11-20 07:14:17,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 07:14:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1212 transitions. [2021-11-20 07:14:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 07:14:17,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:17,090 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:17,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:17,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 07:14:17,319 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash -109375219, now seen corresponding path program 1 times [2021-11-20 07:14:17,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:17,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304295500] [2021-11-20 07:14:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:17,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:17,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:17,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621902711] [2021-11-20 07:14:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:17,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:17,331 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:17,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 07:14:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:17,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:14:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:17,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:17,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:17,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304295500] [2021-11-20 07:14:17,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:17,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621902711] [2021-11-20 07:14:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621902711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:17,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:17,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:14:17,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035058819] [2021-11-20 07:14:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:17,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:14:17,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:14:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:14:17,758 INFO L87 Difference]: Start difference. First operand 948 states and 1212 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:17,874 INFO L93 Difference]: Finished difference Result 972 states and 1236 transitions. [2021-11-20 07:14:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:14:17,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 146 [2021-11-20 07:14:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:17,879 INFO L225 Difference]: With dead ends: 972 [2021-11-20 07:14:17,879 INFO L226 Difference]: Without dead ends: 972 [2021-11-20 07:14:17,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:14:17,880 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 34 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:17,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 281 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:14:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-11-20 07:14:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 947. [2021-11-20 07:14:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 778 states have (on average 1.2789203084832905) internal successors, (995), 846 states have internal predecessors, (995), 108 states have call successors, (108), 6 states have call predecessors, (108), 6 states have return successors, (108), 94 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 07:14:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1211 transitions. [2021-11-20 07:14:17,904 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1211 transitions. Word has length 146 [2021-11-20 07:14:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1211 transitions. [2021-11-20 07:14:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1211 transitions. [2021-11-20 07:14:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 07:14:17,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:17,906 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:17,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:18,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:18,122 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -109375218, now seen corresponding path program 1 times [2021-11-20 07:14:18,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175780776] [2021-11-20 07:14:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:18,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:18,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701755455] [2021-11-20 07:14:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:18,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:18,133 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:18,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 07:14:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:14:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:18,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:18,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175780776] [2021-11-20 07:14:18,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701755455] [2021-11-20 07:14:18,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701755455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:18,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:18,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:14:18,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197471859] [2021-11-20 07:14:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:18,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:14:18,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:14:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:14:18,576 INFO L87 Difference]: Start difference. First operand 947 states and 1211 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:18,747 INFO L93 Difference]: Finished difference Result 946 states and 1210 transitions. [2021-11-20 07:14:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:14:18,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 146 [2021-11-20 07:14:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:18,753 INFO L225 Difference]: With dead ends: 946 [2021-11-20 07:14:18,753 INFO L226 Difference]: Without dead ends: 946 [2021-11-20 07:14:18,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:14:18,754 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 100 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:18,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 214 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:14:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-11-20 07:14:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 946. [2021-11-20 07:14:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 778 states have (on average 1.2776349614395888) internal successors, (994), 845 states have internal predecessors, (994), 108 states have call successors, (108), 6 states have call predecessors, (108), 6 states have return successors, (108), 94 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 07:14:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1210 transitions. [2021-11-20 07:14:18,778 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1210 transitions. Word has length 146 [2021-11-20 07:14:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:18,778 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1210 transitions. [2021-11-20 07:14:18,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1210 transitions. [2021-11-20 07:14:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 07:14:18,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:18,779 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:18,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:18,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:18,980 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1267462795, now seen corresponding path program 1 times [2021-11-20 07:14:18,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:18,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905294295] [2021-11-20 07:14:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:18,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:18,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024822607] [2021-11-20 07:14:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:18,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:18,992 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:18,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 07:14:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:19,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:14:19,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:19,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:19,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905294295] [2021-11-20 07:14:19,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024822607] [2021-11-20 07:14:19,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024822607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:19,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:19,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:14:19,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832446616] [2021-11-20 07:14:19,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:19,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:14:19,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:14:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:19,687 INFO L87 Difference]: Start difference. First operand 946 states and 1210 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:19,836 INFO L93 Difference]: Finished difference Result 969 states and 1233 transitions. [2021-11-20 07:14:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 150 [2021-11-20 07:14:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:19,841 INFO L225 Difference]: With dead ends: 969 [2021-11-20 07:14:19,841 INFO L226 Difference]: Without dead ends: 969 [2021-11-20 07:14:19,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:14:19,841 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 241 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:19,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 199 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:14:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-20 07:14:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 621. [2021-11-20 07:14:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 502 states have (on average 1.2709163346613546) internal successors, (638), 561 states have internal predecessors, (638), 61 states have call successors, (61), 6 states have call predecessors, (61), 6 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-20 07:14:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 760 transitions. [2021-11-20 07:14:19,858 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 760 transitions. Word has length 150 [2021-11-20 07:14:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:19,858 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 760 transitions. [2021-11-20 07:14:19,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 760 transitions. [2021-11-20 07:14:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 07:14:19,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:19,860 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:19,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:20,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-20 07:14:20,075 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1267462794, now seen corresponding path program 1 times [2021-11-20 07:14:20,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:20,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57869453] [2021-11-20 07:14:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:20,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:20,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:20,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043556211] [2021-11-20 07:14:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:20,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:20,085 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:20,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 07:14:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:20,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:14:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:21,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:21,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57869453] [2021-11-20 07:14:21,042 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043556211] [2021-11-20 07:14:21,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043556211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:21,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:21,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:14:21,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435514357] [2021-11-20 07:14:21,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:21,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:14:21,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:14:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:21,044 INFO L87 Difference]: Start difference. First operand 621 states and 760 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:21,192 INFO L93 Difference]: Finished difference Result 621 states and 760 transitions. [2021-11-20 07:14:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:14:21,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 150 [2021-11-20 07:14:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:21,197 INFO L225 Difference]: With dead ends: 621 [2021-11-20 07:14:21,197 INFO L226 Difference]: Without dead ends: 621 [2021-11-20 07:14:21,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:14:21,198 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 376 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:21,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 197 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:14:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-20 07:14:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 620. [2021-11-20 07:14:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 502 states have (on average 1.2689243027888446) internal successors, (637), 560 states have internal predecessors, (637), 61 states have call successors, (61), 6 states have call predecessors, (61), 6 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-20 07:14:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 759 transitions. [2021-11-20 07:14:21,211 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 759 transitions. Word has length 150 [2021-11-20 07:14:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:21,212 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 759 transitions. [2021-11-20 07:14:21,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 759 transitions. [2021-11-20 07:14:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 07:14:21,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:21,213 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:21,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:21,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-20 07:14:21,427 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1738969945, now seen corresponding path program 1 times [2021-11-20 07:14:21,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568928693] [2021-11-20 07:14:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:21,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:21,435 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:21,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669039617] [2021-11-20 07:14:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:21,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:21,436 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:21,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 07:14:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:14:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:14:22,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-20 07:14:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:22,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:22,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568928693] [2021-11-20 07:14:22,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669039617] [2021-11-20 07:14:22,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669039617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:22,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:22,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:14:22,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036400991] [2021-11-20 07:14:22,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:14:22,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:14:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:14:22,522 INFO L87 Difference]: Start difference. First operand 620 states and 759 transitions. Second operand has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:22,974 INFO L93 Difference]: Finished difference Result 668 states and 807 transitions. [2021-11-20 07:14:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:14:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 152 [2021-11-20 07:14:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:22,977 INFO L225 Difference]: With dead ends: 668 [2021-11-20 07:14:22,977 INFO L226 Difference]: Without dead ends: 668 [2021-11-20 07:14:22,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:14:22,978 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 316 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:22,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 597 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:14:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-20 07:14:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 620. [2021-11-20 07:14:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 503 states have (on average 1.268389662027833) internal successors, (638), 560 states have internal predecessors, (638), 61 states have call successors, (61), 6 states have call predecessors, (61), 6 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-20 07:14:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 760 transitions. [2021-11-20 07:14:22,988 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 760 transitions. Word has length 152 [2021-11-20 07:14:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:22,988 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 760 transitions. [2021-11-20 07:14:22,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:14:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 760 transitions. [2021-11-20 07:14:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 07:14:22,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:22,990 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:23,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:23,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:23,191 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1738969946, now seen corresponding path program 1 times [2021-11-20 07:14:23,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126649754] [2021-11-20 07:14:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:23,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:23,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:23,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711545018] [2021-11-20 07:14:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:23,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:23,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:23,207 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:23,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 07:14:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:14:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 07:14:25,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-20 07:14:25,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-20 07:14:25,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 07:14:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2021-11-20 07:14:25,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:14:25,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126649754] [2021-11-20 07:14:25,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711545018] [2021-11-20 07:14:25,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711545018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:25,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:25,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:14:25,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915833308] [2021-11-20 07:14:25,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:25,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:14:25,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:14:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:14:25,245 INFO L87 Difference]: Start difference. First operand 620 states and 760 transitions. Second operand has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:26,176 INFO L93 Difference]: Finished difference Result 699 states and 842 transitions. [2021-11-20 07:14:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:14:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 152 [2021-11-20 07:14:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:26,181 INFO L225 Difference]: With dead ends: 699 [2021-11-20 07:14:26,182 INFO L226 Difference]: Without dead ends: 699 [2021-11-20 07:14:26,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:26,183 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 942 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:26,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 416 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:14:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-20 07:14:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 660. [2021-11-20 07:14:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 543 states have (on average 1.3130755064456723) internal successors, (713), 600 states have internal predecessors, (713), 61 states have call successors, (61), 6 states have call predecessors, (61), 6 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-20 07:14:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 835 transitions. [2021-11-20 07:14:26,198 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 835 transitions. Word has length 152 [2021-11-20 07:14:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:26,199 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 835 transitions. [2021-11-20 07:14:26,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 835 transitions. [2021-11-20 07:14:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 07:14:26,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:26,201 INFO L514 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:26,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:26,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:26,415 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 407843101, now seen corresponding path program 1 times [2021-11-20 07:14:26,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299737262] [2021-11-20 07:14:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:26,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:26,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:14:26,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330914469] [2021-11-20 07:14:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:26,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:26,425 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:26,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-20 07:14:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 07:14:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:26,845 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:14:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 07:14:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 07:14:28,298 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 07:14:28,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 07:14:28,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-20 07:14:28,341 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-20 07:14:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 07:14:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-20 07:14:28,521 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:14:28,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-11-20 07:14:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2021-11-20 07:14:28,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2021-11-20 07:14:34,109 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_l0_insert_#t~mem20#1.base| Int)) (or (forall ((v_arrayElimCell_266 Int)) (= (select |c_#valid| (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| |ULTIMATE.start_l0_insert_#t~mem20#1.base|)))) (store .cse1 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ v_arrayElimCell_266 4))) 1)) (and (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|) (= (select |c_#valid| (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| |ULTIMATE.start_l0_insert_#t~mem20#1.base|)))) (store .cse3 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1) (= |c_ULTIMATE.start_l0_insert_~list#1.base| |c_~#list~0.base|)))) is different from false [2021-11-20 07:14:34,913 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-11-20 07:14:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 70099 treesize of output 67103 [2021-11-20 07:14:37,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299737262] [2021-11-20 07:14:37,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:14:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330914469] [2021-11-20 07:14:37,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 07:14:37,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:37,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 07:14:37,044 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 07:14:37,044 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 07:14:37,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION (74 of 75 remaining) [2021-11-20 07:14:37,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (73 of 75 remaining) [2021-11-20 07:14:37,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (72 of 75 remaining) [2021-11-20 07:14:37,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (71 of 75 remaining) [2021-11-20 07:14:37,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (70 of 75 remaining) [2021-11-20 07:14:37,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (69 of 75 remaining) [2021-11-20 07:14:37,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (68 of 75 remaining) [2021-11-20 07:14:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (67 of 75 remaining) [2021-11-20 07:14:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (66 of 75 remaining) [2021-11-20 07:14:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (65 of 75 remaining) [2021-11-20 07:14:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (64 of 75 remaining) [2021-11-20 07:14:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (63 of 75 remaining) [2021-11-20 07:14:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (62 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (61 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (60 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (59 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (58 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (57 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (56 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (55 of 75 remaining) [2021-11-20 07:14:37,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (54 of 75 remaining) [2021-11-20 07:14:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (53 of 75 remaining) [2021-11-20 07:14:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (52 of 75 remaining) [2021-11-20 07:14:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (51 of 75 remaining) [2021-11-20 07:14:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (50 of 75 remaining) [2021-11-20 07:14:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION (49 of 75 remaining) [2021-11-20 07:14:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (48 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (47 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (46 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (45 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (44 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION (43 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (42 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (41 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION (40 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION (39 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION (38 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION (37 of 75 remaining) [2021-11-20 07:14:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (36 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (35 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION (34 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION (33 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION (32 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION (31 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE (30 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE (29 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE (28 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION (27 of 75 remaining) [2021-11-20 07:14:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION (26 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_FREE (25 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE (24 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE (23 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION (22 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATION (21 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE (20 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE (19 of 75 remaining) [2021-11-20 07:14:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE (18 of 75 remaining) [2021-11-20 07:14:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION (17 of 75 remaining) [2021-11-20 07:14:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATION (16 of 75 remaining) [2021-11-20 07:14:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE (15 of 75 remaining) [2021-11-20 07:14:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE (14 of 75 remaining) [2021-11-20 07:14:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE (13 of 75 remaining) [2021-11-20 07:14:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62REQUIRES_VIOLATION (12 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63REQUIRES_VIOLATION (11 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE (10 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE (9 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE (8 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr67REQUIRES_VIOLATION (7 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr68REQUIRES_VIOLATION (6 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE (5 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr70ASSERT_VIOLATIONMEMORY_FREE (4 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_FREE (3 of 75 remaining) [2021-11-20 07:14:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr72ASSERT_VIOLATIONMEMORY_LEAK (2 of 75 remaining) [2021-11-20 07:14:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE (1 of 75 remaining) [2021-11-20 07:14:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE (0 of 75 remaining) [2021-11-20 07:14:37,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-20 07:14:37,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 07:14:37,265 INFO L732 BasicCegarLoop]: Path program histogram: [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:37,268 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:14:37,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:14:37 BoogieIcfgContainer [2021-11-20 07:14:37,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:14:37,292 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:14:37,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:14:37,293 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:14:37,293 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:08" (3/4) ... [2021-11-20 07:14:37,296 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 07:14:37,296 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:14:37,297 INFO L158 Benchmark]: Toolchain (without parser) took 450193.97ms. Allocated memory was 96.5MB in the beginning and 260.0MB in the end (delta: 163.6MB). Free memory was 61.0MB in the beginning and 193.2MB in the end (delta: -132.3MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2021-11-20 07:14:37,297 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 75.5MB. Free memory was 49.1MB in the beginning and 49.0MB in the end (delta: 26.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:14:37,297 INFO L158 Benchmark]: CACSL2BoogieTranslator took 641.11ms. Allocated memory is still 96.5MB. Free memory was 60.8MB in the beginning and 62.1MB in the end (delta: -1.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:14:37,297 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.86ms. Allocated memory is still 96.5MB. Free memory was 62.1MB in the beginning and 59.1MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:14:37,298 INFO L158 Benchmark]: Boogie Preprocessor took 43.16ms. Allocated memory is still 96.5MB. Free memory was 59.1MB in the beginning and 57.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:14:37,298 INFO L158 Benchmark]: RCFGBuilder took 751.80ms. Allocated memory is still 96.5MB. Free memory was 57.0MB in the beginning and 33.1MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-20 07:14:37,298 INFO L158 Benchmark]: TraceAbstraction took 448653.07ms. Allocated memory was 96.5MB in the beginning and 260.0MB in the end (delta: 163.6MB). Free memory was 32.7MB in the beginning and 194.0MB in the end (delta: -161.3MB). Peak memory consumption was 137.3MB. Max. memory is 16.1GB. [2021-11-20 07:14:37,298 INFO L158 Benchmark]: Witness Printer took 3.92ms. Allocated memory is still 260.0MB. Free memory was 194.0MB in the beginning and 193.2MB in the end (delta: 785.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:14:37,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 75.5MB. Free memory was 49.1MB in the beginning and 49.0MB in the end (delta: 26.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 641.11ms. Allocated memory is still 96.5MB. Free memory was 60.8MB in the beginning and 62.1MB in the end (delta: -1.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.86ms. Allocated memory is still 96.5MB. Free memory was 62.1MB in the beginning and 59.1MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.16ms. Allocated memory is still 96.5MB. Free memory was 59.1MB in the beginning and 57.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 751.80ms. Allocated memory is still 96.5MB. Free memory was 57.0MB in the beginning and 33.1MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 448653.07ms. Allocated memory was 96.5MB in the beginning and 260.0MB in the end (delta: 163.6MB). Free memory was 32.7MB in the beginning and 194.0MB in the end (delta: -161.3MB). Peak memory consumption was 137.3MB. Max. memory is 16.1GB. * Witness Printer took 3.92ms. Allocated memory is still 260.0MB. Free memory was 194.0MB in the beginning and 193.2MB in the end (delta: 785.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 748]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L767] static struct L0 *list; [L769] CALL l0_insert(&list) [L708] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L708] RET, EXPR zalloc_or_die(sizeof *item) [L708] struct L0 *item = zalloc_or_die(sizeof *item); [L710] CALL l1_insert(&item->down) [L699] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L699] RET, EXPR zalloc_or_die(sizeof *item) [L699] struct L1 *item = zalloc_or_die(sizeof *item); [L701] CALL l2_insert(&item->down) [L690] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L690] RET, EXPR zalloc_or_die(sizeof *item) [L690] struct L2 *item = zalloc_or_die(sizeof *item); [L692] CALL l3_insert(&item->down) [L681] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L681] RET, EXPR zalloc_or_die(sizeof *item) [L681] struct L3 *item = zalloc_or_die(sizeof *item); [L683] CALL l4_insert(&item->down) [L674] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L674] RET, EXPR zalloc_or_die(sizeof *item) [L674] struct L4 *item = zalloc_or_die(sizeof *item); [L675] CALL, EXPR zalloc_or_die(119U) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L675] RET, EXPR zalloc_or_die(119U) [L675] item->down = zalloc_or_die(119U) [L676] EXPR \read(**list) [L676] item->next = *list [L677] *list = item [L683] RET l4_insert(&item->down) [L684] COND FALSE !(__VERIFIER_nondet_int()) [L685] EXPR \read(**list) [L685] item->next = *list [L686] *list = item [L692] RET l3_insert(&item->down) [L693] COND FALSE !(__VERIFIER_nondet_int()) [L694] EXPR \read(**list) [L694] item->next = *list [L695] *list = item [L701] RET l2_insert(&item->down) [L702] COND FALSE !(__VERIFIER_nondet_int()) [L703] EXPR \read(**list) [L703] item->next = *list [L704] *list = item [L710] RET l1_insert(&item->down) [L711] COND FALSE !(__VERIFIER_nondet_int()) [L712] EXPR \read(**list) [L712] item->next = *list [L713] *list = item [L769] RET l0_insert(&list) [L770] COND FALSE !(__VERIFIER_nondet_int()) [L771] EXPR \read(*list) [L771] CALL l0_destroy(list) [L758] EXPR list->down [L758] CALL l1_destroy(list->down) [L748] list->down - UnprovableResult [Line: 675]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 675]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 677]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 677]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 686]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 686]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 771]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 748]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 738]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 738]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 728]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 728]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 720]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 729]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 729]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 730]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 730]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 730]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 739]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 739]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 759]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 759]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 760]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 760]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 760]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 765]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 191 locations, 75 error locations. Started 1 CEGAR loops. OverallTime: 448.5s, OverallIterations: 47, TraceHistogramMax: 41, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 56.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6258 SdHoareTripleChecker+Valid, 12.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6251 mSDsluCounter, 41110 SdHoareTripleChecker+Invalid, 10.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11634 IncrementalHoareTripleChecker+Unchecked, 33390 mSDsCounter, 402 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12250 IncrementalHoareTripleChecker+Invalid, 24286 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 402 mSolverCounterUnsat, 7720 mSDtfsCounter, 12250 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6212 GetRequests, 5473 SyntacticMatches, 42 SemanticMatches, 697 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 204.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=951occurred in iteration=38, InterpolantAutomatonStates: 503, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 46 MinimizatonAttempts, 1402 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 24.7s SatisfiabilityAnalysisTime, 351.8s InterpolantComputationTime, 5106 NumberOfCodeBlocks, 4906 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 5716 ConstructedInterpolants, 1113 QuantifiedInterpolants, 47942 SizeOfPredicates, 672 NumberOfNonLiveVariables, 31161 ConjunctsInSsa, 1895 ConjunctsInUnsatCore, 53 InterpolantComputations, 21 PerfectInterpolantSequences, 30671/37224 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 could not prove your program: unable to determine feasibility of some traces [2021-11-20 07:14:37,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:14:39,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:14:39,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:14:39,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:14:39,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:14:39,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:14:39,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:14:39,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:14:39,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:14:39,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:14:39,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:14:39,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:14:39,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:14:39,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:14:39,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:14:39,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:14:39,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:14:39,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:14:39,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:14:39,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:14:39,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:14:39,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:14:39,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:14:39,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:14:39,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:14:39,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:14:39,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:14:39,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:14:39,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:14:39,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:14:39,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:14:39,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:14:39,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:14:39,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:14:39,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:14:39,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:14:39,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:14:39,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:14:39,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:14:39,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:14:39,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:14:39,890 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 07:14:39,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:14:39,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:14:39,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:14:39,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:14:39,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:14:39,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:14:39,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:14:39,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:14:39,939 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:14:39,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:14:39,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:14:39,940 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:14:39,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:14:39,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:14:39,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:14:39,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:14:39,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:14:39,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:14:39,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:14:39,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:14:39,943 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 07:14:39,943 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 07:14:39,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:14:39,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:14:39,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:14:39,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:14:39,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:14:39,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:14:39,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:14:39,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:14:39,945 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 07:14:39,945 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 07:14:39,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:14:39,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 07:14:39,946 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2021-11-20 07:14:40,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:14:40,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:14:40,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:14:40,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:14:40,376 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:14:40,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety/test-0234-1.i [2021-11-20 07:14:40,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/285f02fbc/6f1a271ae3a04852bfe3816976c01d84/FLAGe44c32637 [2021-11-20 07:14:41,138 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:14:41,139 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/sv-benchmarks/c/memsafety/test-0234-1.i [2021-11-20 07:14:41,162 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/285f02fbc/6f1a271ae3a04852bfe3816976c01d84/FLAGe44c32637 [2021-11-20 07:14:41,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/data/285f02fbc/6f1a271ae3a04852bfe3816976c01d84 [2021-11-20 07:14:41,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:14:41,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:14:41,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:14:41,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:14:41,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:14:41,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:41" (1/1) ... [2021-11-20 07:14:41,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547704ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:41, skipping insertion in model container [2021-11-20 07:14:41,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:41" (1/1) ... [2021-11-20 07:14:41,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:14:41,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:14:41,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:14:41,926 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:14:42,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:14:42,078 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:14:42,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42 WrapperNode [2021-11-20 07:14:42,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:14:42,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:14:42,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:14:42,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:14:42,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,158 INFO L137 Inliner]: procedures = 189, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 199 [2021-11-20 07:14:42,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:14:42,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:14:42,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:14:42,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:14:42,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:14:42,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:14:42,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:14:42,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:14:42,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (1/1) ... [2021-11-20 07:14:42,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:14:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:42,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:14:42,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:14:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:14:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:14:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:14:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:14:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-11-20 07:14:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-11-20 07:14:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:14:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:14:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 07:14:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:14:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:14:42,491 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:14:42,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:14:43,321 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:14:43,335 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:14:43,335 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-20 07:14:43,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:43 BoogieIcfgContainer [2021-11-20 07:14:43,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:14:43,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:14:43,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:14:43,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:14:43,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:14:41" (1/3) ... [2021-11-20 07:14:43,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f981655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:14:43, skipping insertion in model container [2021-11-20 07:14:43,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:42" (2/3) ... [2021-11-20 07:14:43,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f981655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:14:43, skipping insertion in model container [2021-11-20 07:14:43,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:43" (3/3) ... [2021-11-20 07:14:43,348 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2021-11-20 07:14:43,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:14:43,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2021-11-20 07:14:43,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:14:43,428 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:14:43,429 INFO L340 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2021-11-20 07:14:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 103 states have (on average 1.941747572815534) internal successors, (200), 178 states have internal predecessors, (200), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 07:14:43,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:43,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 07:14:43,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:43,479 INFO L85 PathProgramCache]: Analyzing trace with hash 929958, now seen corresponding path program 1 times [2021-11-20 07:14:43,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:43,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572756176] [2021-11-20 07:14:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:43,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:43,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:43,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:14:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 07:14:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:43,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:43,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:43,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572756176] [2021-11-20 07:14:43,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572756176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:43,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:43,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 07:14:43,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696499782] [2021-11-20 07:14:43,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:43,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:14:43,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:14:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:14:43,717 INFO L87 Difference]: Start difference. First operand has 186 states, 103 states have (on average 1.941747572815534) internal successors, (200), 178 states have internal predecessors, (200), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:43,766 INFO L93 Difference]: Finished difference Result 186 states and 201 transitions. [2021-11-20 07:14:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:14:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-20 07:14:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:43,788 INFO L225 Difference]: With dead ends: 186 [2021-11-20 07:14:43,788 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 07:14:43,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:14:43,796 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:43,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:14:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 07:14:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-20 07:14:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 102 states have (on average 1.8333333333333333) internal successors, (187), 176 states have internal predecessors, (187), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2021-11-20 07:14:43,883 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 4 [2021-11-20 07:14:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:43,884 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2021-11-20 07:14:43,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2021-11-20 07:14:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:14:43,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:43,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:14:43,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:44,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:44,096 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 889837653, now seen corresponding path program 1 times [2021-11-20 07:14:44,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339170262] [2021-11-20 07:14:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:44,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:44,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:44,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:14:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:14:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:44,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:14:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:44,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:44,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339170262] [2021-11-20 07:14:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339170262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:44,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:44,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 07:14:44,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580323921] [2021-11-20 07:14:44,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:44,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:14:44,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:14:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:14:44,282 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:44,555 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2021-11-20 07:14:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:14:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 07:14:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:44,558 INFO L225 Difference]: With dead ends: 183 [2021-11-20 07:14:44,558 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 07:14:44,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:14:44,560 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:44,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 306 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:14:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 07:14:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-20 07:14:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 102 states have (on average 1.8235294117647058) internal successors, (186), 175 states have internal predecessors, (186), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2021-11-20 07:14:44,576 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 6 [2021-11-20 07:14:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:44,577 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2021-11-20 07:14:44,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2021-11-20 07:14:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:14:44,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:44,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:44,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:44,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:44,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1815163792, now seen corresponding path program 1 times [2021-11-20 07:14:44,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:44,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990699788] [2021-11-20 07:14:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:44,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:44,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:44,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:44,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:14:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:14:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:44,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:14:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:44,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:45,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990699788] [2021-11-20 07:14:45,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990699788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:45,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:45,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 4 [2021-11-20 07:14:45,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734205479] [2021-11-20 07:14:45,069 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:45,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:14:45,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:14:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:14:45,070 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:45,834 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2021-11-20 07:14:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 07:14:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:45,837 INFO L225 Difference]: With dead ends: 191 [2021-11-20 07:14:45,837 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 07:14:45,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:14:45,839 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:45,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 496 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:14:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 07:14:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-20 07:14:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 110 states have (on average 1.7636363636363637) internal successors, (194), 182 states have internal predecessors, (194), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2021-11-20 07:14:45,856 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 7 [2021-11-20 07:14:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:45,856 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2021-11-20 07:14:45,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2021-11-20 07:14:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:14:45,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:45,860 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:45,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:46,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:46,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1554743510, now seen corresponding path program 1 times [2021-11-20 07:14:46,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:46,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468204428] [2021-11-20 07:14:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:46,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:46,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:46,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:14:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:46,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:14:46,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 07:14:46,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 07:14:46,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:46,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468204428] [2021-11-20 07:14:46,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468204428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:46,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:14:46,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-20 07:14:46,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757321790] [2021-11-20 07:14:46,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:46,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:14:46,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:14:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:14:46,844 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:46,957 INFO L93 Difference]: Finished difference Result 203 states and 218 transitions. [2021-11-20 07:14:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:14:46,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-11-20 07:14:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:46,960 INFO L225 Difference]: With dead ends: 203 [2021-11-20 07:14:46,960 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 07:14:46,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:14:46,962 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 12 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:46,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 726 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:14:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 07:14:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-20 07:14:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 112 states have (on average 1.75) internal successors, (196), 184 states have internal predecessors, (196), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2021-11-20 07:14:46,978 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 73 [2021-11-20 07:14:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:46,979 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2021-11-20 07:14:46,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:14:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2021-11-20 07:14:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 07:14:46,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:46,983 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:47,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:47,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:47,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1989647298, now seen corresponding path program 1 times [2021-11-20 07:14:47,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:47,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34858833] [2021-11-20 07:14:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:47,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:47,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:47,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:14:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:14:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-20 07:14:47,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 07:14:48,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34858833] [2021-11-20 07:14:48,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34858833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:48,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:48,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:14:48,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519584308] [2021-11-20 07:14:48,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:48,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:14:48,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:14:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:14:48,087 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 07:14:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:48,461 INFO L93 Difference]: Finished difference Result 212 states and 228 transitions. [2021-11-20 07:14:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:14:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 79 [2021-11-20 07:14:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:48,465 INFO L225 Difference]: With dead ends: 212 [2021-11-20 07:14:48,465 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 07:14:48,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:48,468 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 35 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:48,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1272 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:14:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 07:14:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-20 07:14:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 116 states have (on average 1.7241379310344827) internal successors, (200), 188 states have internal predecessors, (200), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2021-11-20 07:14:48,490 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 79 [2021-11-20 07:14:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:48,491 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2021-11-20 07:14:48,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 07:14:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2021-11-20 07:14:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 07:14:48,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:48,502 INFO L514 BasicCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:48,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:48,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:48,723 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -674977782, now seen corresponding path program 2 times [2021-11-20 07:14:48,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034911594] [2021-11-20 07:14:48,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:14:48,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:48,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:48,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:48,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:14:48,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:14:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:14:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:14:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 155 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-20 07:14:49,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-20 07:14:49,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:49,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034911594] [2021-11-20 07:14:49,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034911594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:49,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:49,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 07:14:49,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037003285] [2021-11-20 07:14:49,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:49,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:14:49,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:14:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:14:49,967 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 07:14:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:50,721 INFO L93 Difference]: Finished difference Result 229 states and 246 transitions. [2021-11-20 07:14:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:14:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2021-11-20 07:14:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:50,727 INFO L225 Difference]: With dead ends: 229 [2021-11-20 07:14:50,728 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 07:14:50,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:14:50,729 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 104 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:50,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1340 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:14:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 07:14:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-20 07:14:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 123 states have (on average 1.6829268292682926) internal successors, (207), 195 states have internal predecessors, (207), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2021-11-20 07:14:50,737 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 95 [2021-11-20 07:14:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:50,738 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2021-11-20 07:14:50,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 07:14:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2021-11-20 07:14:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:14:50,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:50,740 INFO L514 BasicCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:50,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:50,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:50,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1892288145, now seen corresponding path program 3 times [2021-11-20 07:14:50,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870501828] [2021-11-20 07:14:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:14:50,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:50,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:50,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:14:51,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:14:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:14:51,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:14:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:51,641 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 07:14:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-11-20 07:14:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2021-11-20 07:14:51,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:52,225 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:14:52,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 07:14:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2021-11-20 07:14:52,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870501828] [2021-11-20 07:14:52,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870501828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:52,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:52,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-11-20 07:14:52,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857336365] [2021-11-20 07:14:52,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:52,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:14:52,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:14:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:14:52,365 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:14:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:53,593 INFO L93 Difference]: Finished difference Result 236 states and 255 transitions. [2021-11-20 07:14:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:14:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 118 [2021-11-20 07:14:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:53,598 INFO L225 Difference]: With dead ends: 236 [2021-11-20 07:14:53,598 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 07:14:53,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:14:53,599 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 116 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:53,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1073 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 0 Unknown, 106 Unchecked, 1.0s Time] [2021-11-20 07:14:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 07:14:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 202. [2021-11-20 07:14:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 193 states have internal predecessors, (205), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 217 transitions. [2021-11-20 07:14:53,608 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 217 transitions. Word has length 118 [2021-11-20 07:14:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:53,609 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 217 transitions. [2021-11-20 07:14:53,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:14:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 217 transitions. [2021-11-20 07:14:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:14:53,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:53,611 INFO L514 BasicCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:53,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:53,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:53,827 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1892288144, now seen corresponding path program 1 times [2021-11-20 07:14:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001495730] [2021-11-20 07:14:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:53,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:53,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:53,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:53,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:14:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:14:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:14:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:14:55,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001495730] [2021-11-20 07:14:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001495730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:55,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:55,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 07:14:55,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374701036] [2021-11-20 07:14:55,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:55,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:14:55,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:14:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:14:55,893 INFO L87 Difference]: Start difference. First operand 202 states and 217 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:14:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:56,973 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2021-11-20 07:14:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:14:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 118 [2021-11-20 07:14:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:56,977 INFO L225 Difference]: With dead ends: 219 [2021-11-20 07:14:56,977 INFO L226 Difference]: Without dead ends: 209 [2021-11-20 07:14:56,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:14:56,979 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 98 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:56,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2193 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:14:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-20 07:14:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-20 07:14:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 130 states have (on average 1.6307692307692307) internal successors, (212), 200 states have internal predecessors, (212), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:14:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 224 transitions. [2021-11-20 07:14:56,987 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 224 transitions. Word has length 118 [2021-11-20 07:14:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:56,987 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 224 transitions. [2021-11-20 07:14:56,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:14:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 224 transitions. [2021-11-20 07:14:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:14:56,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:56,989 INFO L514 BasicCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:57,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:57,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:57,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:14:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1703298197, now seen corresponding path program 2 times [2021-11-20 07:14:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98204625] [2021-11-20 07:14:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:14:57,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:57,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:57,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:57,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:14:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:14:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:14:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:14:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:14:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:15:00,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:15:00,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98204625] [2021-11-20 07:15:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98204625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:15:00,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:00,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-20 07:15:00,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334545535] [2021-11-20 07:15:00,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:00,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:15:00,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:15:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:15:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:15:00,216 INFO L87 Difference]: Start difference. First operand 209 states and 224 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:15:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:04,179 INFO L93 Difference]: Finished difference Result 257 states and 303 transitions. [2021-11-20 07:15:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 07:15:04,180 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 125 [2021-11-20 07:15:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:04,187 INFO L225 Difference]: With dead ends: 257 [2021-11-20 07:15:04,187 INFO L226 Difference]: Without dead ends: 247 [2021-11-20 07:15:04,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1195, Invalid=2345, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:15:04,193 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 471 mSDsluCounter, 3107 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 3308 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:04,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 3308 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:15:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-20 07:15:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-11-20 07:15:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 148 states have (on average 1.5743243243243243) internal successors, (233), 218 states have internal predecessors, (233), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:15:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2021-11-20 07:15:04,207 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 125 [2021-11-20 07:15:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:04,209 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2021-11-20 07:15:04,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:15:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2021-11-20 07:15:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 07:15:04,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:04,216 INFO L514 BasicCegarLoop]: trace histogram [66, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:04,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:15:04,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:15:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1448015925, now seen corresponding path program 3 times [2021-11-20 07:15:04,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:15:04,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585248204] [2021-11-20 07:15:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:15:04,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:15:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:15:04,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:15:04,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:15:04,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:15:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:15:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:15:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:04,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:15:09,706 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:15:09,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-20 07:15:09,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:15:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-11-20 07:15:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1357 proven. 250 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2021-11-20 07:15:10,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:49,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_l4_insert_~item~0#1.base_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_zalloc_or_die_calloc_model_~ptr~0#1.base_124| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_124|)))) (exists ((|v_zalloc_or_die_calloc_model_~ptr~0#1.base_123| (_ BitVec 32))) (and (or (exists ((|v_zalloc_or_die_calloc_model_~size#1_122| (_ BitVec 32)) (|v_zalloc_or_die_calloc_model_~nmemb#1_122| (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32)) (select (store |c_old(#length)| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_123| (bvmul |v_zalloc_or_die_calloc_model_~nmemb#1_122| |v_zalloc_or_die_calloc_model_~size#1_122|)) |v_ULTIMATE.start_l4_insert_~item~0#1.base_BEFORE_CALL_4|)))) (not (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv4 32)) (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_123|)))))) (and (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv4 32)) (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32))) (forall ((|v_zalloc_or_die_calloc_model_~size#1_123| (_ BitVec 32)) (|v_zalloc_or_die_calloc_model_~nmemb#1_123| (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32)) (select (store |c_#length| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_124| (bvmul |v_zalloc_or_die_calloc_model_~nmemb#1_123| |v_zalloc_or_die_calloc_model_~size#1_123|)) |v_ULTIMATE.start_l4_insert_~item~0#1.base_BEFORE_CALL_4|)))))) is different from false [2021-11-20 07:15:56,323 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:15:56,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 07:15:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1357 proven. 250 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2021-11-20 07:15:57,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:15:57,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585248204] [2021-11-20 07:15:57,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585248204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:15:57,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:57,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-20 07:15:57,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693143085] [2021-11-20 07:15:57,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:15:57,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:15:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:15:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=4, NotChecked=38, Total=462 [2021-11-20 07:15:57,726 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 22 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 16 states have internal predecessors, (60), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 07:16:02,816 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_l4_insert_~item~0#1.base_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_zalloc_or_die_calloc_model_~ptr~0#1.base_124| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_124|)))) (exists ((|v_zalloc_or_die_calloc_model_~ptr~0#1.base_123| (_ BitVec 32))) (and (or (exists ((|v_zalloc_or_die_calloc_model_~size#1_122| (_ BitVec 32)) (|v_zalloc_or_die_calloc_model_~nmemb#1_122| (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32)) (select (store |c_old(#length)| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_123| (bvmul |v_zalloc_or_die_calloc_model_~nmemb#1_122| |v_zalloc_or_die_calloc_model_~size#1_122|)) |v_ULTIMATE.start_l4_insert_~item~0#1.base_BEFORE_CALL_4|)))) (not (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv4 32)) (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_123|)))))) (and (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv4 32)) (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32))) (forall ((|v_zalloc_or_die_calloc_model_~size#1_123| (_ BitVec 32)) (|v_zalloc_or_die_calloc_model_~nmemb#1_123| (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_l4_insert_~item~0#1.offset_BEFORE_CALL_2| (_ bv8 32)) (select (store |c_#length| |v_zalloc_or_die_calloc_model_~ptr~0#1.base_124| (bvmul |v_zalloc_or_die_calloc_model_~nmemb#1_123| |v_zalloc_or_die_calloc_model_~size#1_123|)) |v_ULTIMATE.start_l4_insert_~item~0#1.base_BEFORE_CALL_4|))))))) is different from false [2021-11-20 07:16:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:04,642 INFO L93 Difference]: Finished difference Result 259 states and 281 transitions. [2021-11-20 07:16:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:16:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 16 states have internal predecessors, (60), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 139 [2021-11-20 07:16:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:04,646 INFO L225 Difference]: With dead ends: 259 [2021-11-20 07:16:04,647 INFO L226 Difference]: Without dead ends: 259 [2021-11-20 07:16:04,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=84, Invalid=569, Unknown=5, NotChecked=98, Total=756 [2021-11-20 07:16:04,648 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 278 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 941 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:04,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1372 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 526 Invalid, 0 Unknown, 941 Unchecked, 1.9s Time] [2021-11-20 07:16:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-20 07:16:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 225. [2021-11-20 07:16:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 148 states have (on average 1.5608108108108107) internal successors, (231), 216 states have internal predecessors, (231), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:16:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 243 transitions. [2021-11-20 07:16:04,661 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 243 transitions. Word has length 139 [2021-11-20 07:16:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:04,662 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 243 transitions. [2021-11-20 07:16:04,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 16 states have internal predecessors, (60), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 07:16:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 243 transitions. [2021-11-20 07:16:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 07:16:04,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:04,665 INFO L514 BasicCegarLoop]: trace histogram [66, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:04,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:04,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:16:04,882 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:16:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash 26099243, now seen corresponding path program 1 times [2021-11-20 07:16:04,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:16:04,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758023809] [2021-11-20 07:16:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:04,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:16:04,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:16:04,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:16:04,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:16:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:06,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:16:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:16:09,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:16:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:16:15,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:16:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758023809] [2021-11-20 07:16:15,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758023809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:16:15,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:16:15,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-11-20 07:16:15,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30677510] [2021-11-20 07:16:15,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:16:15,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 07:16:15,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:16:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 07:16:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2582, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:16:15,384 INFO L87 Difference]: Start difference. First operand 225 states and 243 transitions. Second operand has 60 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 60 states have internal predecessors, (92), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:16:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:45,156 INFO L93 Difference]: Finished difference Result 283 states and 343 transitions. [2021-11-20 07:16:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-20 07:16:45,157 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 60 states have internal predecessors, (92), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 141 [2021-11-20 07:16:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:45,160 INFO L225 Difference]: With dead ends: 283 [2021-11-20 07:16:45,160 INFO L226 Difference]: Without dead ends: 273 [2021-11-20 07:16:45,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=3526, Invalid=6980, Unknown=0, NotChecked=0, Total=10506 [2021-11-20 07:16:45,167 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 1134 mSDsluCounter, 6123 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:45,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 6326 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-20 07:16:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-20 07:16:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 253. [2021-11-20 07:16:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 176 states have (on average 1.4715909090909092) internal successors, (259), 244 states have internal predecessors, (259), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:16:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 271 transitions. [2021-11-20 07:16:45,182 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 271 transitions. Word has length 141 [2021-11-20 07:16:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:45,183 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 271 transitions. [2021-11-20 07:16:45,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 60 states have internal predecessors, (92), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:16:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 271 transitions. [2021-11-20 07:16:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-20 07:16:45,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:45,186 INFO L514 BasicCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:45,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:45,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:16:45,411 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:16:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash 940977899, now seen corresponding path program 2 times [2021-11-20 07:16:45,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:16:45,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350497217] [2021-11-20 07:16:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:16:45,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:16:45,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:16:45,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:16:45,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:16:46,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:16:46,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:16:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 07:16:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:16:55,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 07:17:14,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:17:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350497217] [2021-11-20 07:17:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350497217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:17:14,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:17:14,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2021-11-20 07:17:14,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474651525] [2021-11-20 07:17:14,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:14,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-20 07:17:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:17:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-20 07:17:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=9862, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 07:17:14,235 INFO L87 Difference]: Start difference. First operand 253 states and 271 transitions. Second operand has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:19:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:39,673 INFO L93 Difference]: Finished difference Result 339 states and 427 transitions. [2021-11-20 07:19:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-20 07:19:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 169 [2021-11-20 07:19:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:39,676 INFO L225 Difference]: With dead ends: 339 [2021-11-20 07:19:39,677 INFO L226 Difference]: Without dead ends: 329 [2021-11-20 07:19:39,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6550 ImplicationChecksByTransitivity, 139.8s TimeCoverageRelationStatistics Valid=11646, Invalid=23136, Unknown=0, NotChecked=0, Total=34782 [2021-11-20 07:19:39,689 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 2818 mSDsluCounter, 11434 mSDsCounter, 0 mSdLazyCounter, 5294 mSolverCounterSat, 1900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2818 SdHoareTripleChecker+Valid, 11637 SdHoareTripleChecker+Invalid, 7194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1900 IncrementalHoareTripleChecker+Valid, 5294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:39,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2818 Valid, 11637 Invalid, 7194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1900 Valid, 5294 Invalid, 0 Unknown, 0 Unchecked, 28.5s Time] [2021-11-20 07:19:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-20 07:19:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 309. [2021-11-20 07:19:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 232 states have (on average 1.3577586206896552) internal successors, (315), 300 states have internal predecessors, (315), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:19:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 327 transitions. [2021-11-20 07:19:39,701 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 327 transitions. Word has length 169 [2021-11-20 07:19:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:39,702 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 327 transitions. [2021-11-20 07:19:39,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 07:19:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 327 transitions. [2021-11-20 07:19:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 07:19:39,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:39,706 INFO L514 BasicCegarLoop]: trace histogram [150, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:39,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:39,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:19:39,911 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 71 more)] === [2021-11-20 07:19:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1119866773, now seen corresponding path program 3 times [2021-11-20 07:19:39,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:19:39,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63302116] [2021-11-20 07:19:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:19:39,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:19:39,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:19:39,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:19:39,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cf8f15a-1943-4053-b7c8-1e5d802da150/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:19:40,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:19:40,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:19:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:19:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:41,258 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 07:19:41,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-11-20 07:19:42,652 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 07:19:42,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 62 [2021-11-20 07:19:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 3641 proven. 2013 refuted. 0 times theorem prover too weak. 6556 trivial. 0 not checked. [2021-11-20 07:19:42,989 INFO L328 TraceCheckSpWp]: Computing backward predicates...