./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:34:01,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:34:01,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:34:01,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:34:01,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:34:01,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:34:01,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:34:01,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:34:01,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:34:01,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:34:01,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:34:01,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:34:01,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:34:01,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:34:01,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:34:01,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:34:01,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:34:01,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:34:01,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:34:01,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:34:01,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:34:01,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:34:01,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:34:01,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:34:01,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:34:01,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:34:01,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:34:01,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:34:01,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:34:01,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:34:01,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:34:01,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:34:01,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:34:01,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:34:01,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:34:01,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:34:01,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:34:01,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:34:01,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:34:01,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:34:01,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:34:01,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:34:01,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:34:01,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:34:01,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:34:01,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:34:01,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:34:01,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:34:01,927 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:34:01,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:34:01,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:34:01,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:34:01,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:34:01,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:34:01,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:34:01,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:34:01,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:34:01,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:34:01,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:34:01,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:34:01,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:34:01,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:34:01,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:34:01,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:34:01,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:34:01,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:34:01,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:34:01,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:34:01,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:34:01,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:34:01,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:34:01,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:34:01,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:34:01,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:34:01,935 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_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2021-11-07 07:34:02,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:34:02,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:34:02,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:34:02,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:34:02,264 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:34:02,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2021-11-07 07:34:02,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/data/e1634b80c/eec3dcbb1b4b47a1b503bbfaa70cac25/FLAGfaf3fd922 [2021-11-07 07:34:02,879 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:34:02,879 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2021-11-07 07:34:02,886 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/data/e1634b80c/eec3dcbb1b4b47a1b503bbfaa70cac25/FLAGfaf3fd922 [2021-11-07 07:34:03,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/data/e1634b80c/eec3dcbb1b4b47a1b503bbfaa70cac25 [2021-11-07 07:34:03,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:34:03,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:34:03,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:34:03,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:34:03,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:34:03,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b22c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03, skipping insertion in model container [2021-11-07 07:34:03,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:34:03,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:34:03,518 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2021-11-07 07:34:03,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:34:03,557 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:34:03,571 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2021-11-07 07:34:03,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:34:03,604 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:34:03,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03 WrapperNode [2021-11-07 07:34:03,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:34:03,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:34:03,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:34:03,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:34:03,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:34:03,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:34:03,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:34:03,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:34:03,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:34:03,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:34:03,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:34:03,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:34:03,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (1/1) ... [2021-11-07 07:34:03,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:34:03,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:03,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:34:03,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:34:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:34:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:34:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:34:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:34:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:34:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:34:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:34:04,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:34:04,215 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-07 07:34:04,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:04 BoogieIcfgContainer [2021-11-07 07:34:04,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:34:04,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:34:04,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:34:04,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:34:04,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:34:03" (1/3) ... [2021-11-07 07:34:04,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b24068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:04, skipping insertion in model container [2021-11-07 07:34:04,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:03" (2/3) ... [2021-11-07 07:34:04,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b24068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:04, skipping insertion in model container [2021-11-07 07:34:04,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:04" (3/3) ... [2021-11-07 07:34:04,249 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2021-11-07 07:34:04,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:34:04,256 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:34:04,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:34:04,315 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:34:04,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:34:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 42 states have internal predecessors, (66), 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) [2021-11-07 07:34:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:34:04,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:04,352 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:04,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-11-07 07:34:04,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:04,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059783978] [2021-11-07 07:34:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:04,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:04,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:04,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059783978] [2021-11-07 07:34:04,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059783978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:04,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:04,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:34:04,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016510637] [2021-11-07 07:34:04,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:34:04,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:34:04,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:34:04,702 INFO L87 Difference]: Start difference. First operand has 43 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 42 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:04,742 INFO L93 Difference]: Finished difference Result 81 states and 124 transitions. [2021-11-07 07:34:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:34:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:34:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:04,758 INFO L225 Difference]: With dead ends: 81 [2021-11-07 07:34:04,758 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 07:34:04,762 INFO L786 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 [2021-11-07 07:34:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 07:34:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 07:34:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-07 07:34:04,814 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-11-07 07:34:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:04,816 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-07 07:34:04,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-07 07:34:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:34:04,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:04,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:04,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:34:04,821 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-11-07 07:34:04,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:04,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049411252] [2021-11-07 07:34:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:04,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:04,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:04,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049411252] [2021-11-07 07:34:04,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049411252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:04,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:04,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:04,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237613071] [2021-11-07 07:34:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:04,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:04,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:04,971 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:05,096 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-11-07 07:34:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:05,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:34:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:05,099 INFO L225 Difference]: With dead ends: 75 [2021-11-07 07:34:05,100 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 07:34:05,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 07:34:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-07 07:34:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-07 07:34:05,118 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-11-07 07:34:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-07 07:34:05,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-07 07:34:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:34:05,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:05,122 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:05,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:34:05,123 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-11-07 07:34:05,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:05,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892338404] [2021-11-07 07:34:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:05,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:34:05,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892338404] [2021-11-07 07:34:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892338404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:05,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:05,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627851767] [2021-11-07 07:34:05,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:05,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:05,260 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-11-07 07:34:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:05,417 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2021-11-07 07:34:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:34:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2021-11-07 07:34:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:05,420 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:34:05,420 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 07:34:05,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 07:34:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-11-07 07:34:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2021-11-07 07:34:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-11-07 07:34:05,430 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-11-07 07:34:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:05,430 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-11-07 07:34:05,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-11-07 07:34:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-11-07 07:34:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:34:05,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:05,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:05,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:34:05,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-11-07 07:34:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:05,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832182129] [2021-11-07 07:34:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:05,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:34:05,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:05,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832182129] [2021-11-07 07:34:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832182129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:05,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665535470] [2021-11-07 07:34:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:05,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:05,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:05,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:34:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:34:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:34:05,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665535470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:05,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:05,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 07:34:05,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050467057] [2021-11-07 07:34:05,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:34:05,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:34:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:34:05,985 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:06,120 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-11-07 07:34:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:06,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 07:34:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:06,122 INFO L225 Difference]: With dead ends: 97 [2021-11-07 07:34:06,123 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 07:34:06,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:34:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 07:34:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-11-07 07:34:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2021-11-07 07:34:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-07 07:34:06,142 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-11-07 07:34:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:06,143 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-07 07:34:06,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-07 07:34:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:34:06,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:06,147 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:06,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:06,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:06,371 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-11-07 07:34:06,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:06,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685787630] [2021-11-07 07:34:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:06,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 07:34:06,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:06,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685787630] [2021-11-07 07:34:06,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685787630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:06,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596933396] [2021-11-07 07:34:06,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:34:06,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:06,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:06,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:06,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:34:06,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:34:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:06,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:34:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 07:34:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596933396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:06,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:06,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-07 07:34:06,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587583938] [2021-11-07 07:34:06,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:34:06,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:34:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:34:06,880 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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) [2021-11-07 07:34:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:07,107 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2021-11-07 07:34:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:34:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 07:34:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:07,113 INFO L225 Difference]: With dead ends: 123 [2021-11-07 07:34:07,113 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 07:34:07,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:34:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 07:34:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-11-07 07:34:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2021-11-07 07:34:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-07 07:34:07,133 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-11-07 07:34:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:07,133 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-07 07:34:07,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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) [2021-11-07 07:34:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-07 07:34:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:34:07,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:07,148 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:07,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:07,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:07,349 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-11-07 07:34:07,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:07,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003404594] [2021-11-07 07:34:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:07,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:09,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:09,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003404594] [2021-11-07 07:34:09,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003404594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:09,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438429626] [2021-11-07 07:34:09,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:34:09,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:09,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:09,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:34:09,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 07:34:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:09,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-07 07:34:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:13,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:34:13,716 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2021-11-07 07:34:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:14,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438429626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:14,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:14,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27] total 42 [2021-11-07 07:34:14,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818656356] [2021-11-07 07:34:14,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:34:14,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:34:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:34:14,054 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 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) [2021-11-07 07:34:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:17,240 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2021-11-07 07:34:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:34:17,242 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 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 71 [2021-11-07 07:34:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:17,244 INFO L225 Difference]: With dead ends: 207 [2021-11-07 07:34:17,244 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 07:34:17,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 61 SyntacticMatches, 25 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=315, Invalid=3107, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:34:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 07:34:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2021-11-07 07:34:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 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) [2021-11-07 07:34:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-11-07 07:34:17,283 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-11-07 07:34:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:17,284 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-11-07 07:34:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 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) [2021-11-07 07:34:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-11-07 07:34:17,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:34:17,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:17,290 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:17,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:17,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:17,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-11-07 07:34:17,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:17,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349615776] [2021-11-07 07:34:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:17,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:34:17,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:17,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349615776] [2021-11-07 07:34:17,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349615776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:17,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891099831] [2021-11-07 07:34:17,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:34:17,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:17,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:17,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:17,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:34:17,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:34:17,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:17,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:34:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:34:18,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891099831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:18,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:18,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-07 07:34:18,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724158769] [2021-11-07 07:34:18,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:34:18,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:34:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:34:18,309 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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) [2021-11-07 07:34:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:18,786 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2021-11-07 07:34:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:34:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 73 [2021-11-07 07:34:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:18,789 INFO L225 Difference]: With dead ends: 289 [2021-11-07 07:34:18,789 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:34:18,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:34:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:34:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2021-11-07 07:34:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 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) [2021-11-07 07:34:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2021-11-07 07:34:18,811 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2021-11-07 07:34:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2021-11-07 07:34:18,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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) [2021-11-07 07:34:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2021-11-07 07:34:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:34:18,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:18,813 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:18,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:19,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:19,027 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2021-11-07 07:34:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:19,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87079661] [2021-11-07 07:34:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:19,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-07 07:34:19,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:19,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87079661] [2021-11-07 07:34:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87079661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:19,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475174089] [2021-11-07 07:34:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:34:19,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:19,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:19,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:19,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:34:19,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 07:34:19,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:19,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:34:19,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-07 07:34:19,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475174089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:19,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:19,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-07 07:34:19,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673908696] [2021-11-07 07:34:19,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:34:19,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:34:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:34:19,910 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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) [2021-11-07 07:34:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:20,349 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2021-11-07 07:34:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:34:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 75 [2021-11-07 07:34:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:20,351 INFO L225 Difference]: With dead ends: 156 [2021-11-07 07:34:20,351 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:34:20,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:34:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:34:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-11-07 07:34:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 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) [2021-11-07 07:34:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-11-07 07:34:20,372 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-11-07 07:34:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:20,373 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-11-07 07:34:20,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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) [2021-11-07 07:34:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-11-07 07:34:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 07:34:20,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:20,375 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:20,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 07:34:20,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:34:20,591 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-11-07 07:34:20,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:20,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488394368] [2021-11-07 07:34:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:20,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:28,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:28,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488394368] [2021-11-07 07:34:28,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488394368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:28,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956410333] [2021-11-07 07:34:28,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:34:28,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:28,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:28,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:34:28,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 07:34:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:28,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-07 07:34:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:37,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956410333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:37,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:37,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 49] total 102 [2021-11-07 07:34:37,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502408106] [2021-11-07 07:34:37,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 07:34:37,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 07:34:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=9762, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:34:37,202 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 102 states, 102 states have (on average 1.7450980392156863) internal successors, (178), 102 states have internal predecessors, (178), 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) [2021-11-07 07:34:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:47,341 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2021-11-07 07:34:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:34:47,342 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.7450980392156863) internal successors, (178), 102 states have internal predecessors, (178), 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 93 [2021-11-07 07:34:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:47,344 INFO L225 Difference]: With dead ends: 183 [2021-11-07 07:34:47,344 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 07:34:47,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 49 SyntacticMatches, 23 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 5924 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=1006, Invalid=16024, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:34:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 07:34:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2021-11-07 07:34:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.123456790123457) internal successors, (182), 162 states have internal predecessors, (182), 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) [2021-11-07 07:34:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2021-11-07 07:34:47,374 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 93 [2021-11-07 07:34:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:47,375 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2021-11-07 07:34:47,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.7450980392156863) internal successors, (178), 102 states have internal predecessors, (178), 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) [2021-11-07 07:34:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2021-11-07 07:34:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 07:34:47,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:47,378 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:47,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:47,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:47,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1592040608, now seen corresponding path program 7 times [2021-11-07 07:34:47,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:47,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151499776] [2021-11-07 07:34:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:47,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:34:47,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:47,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151499776] [2021-11-07 07:34:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151499776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:47,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941701275] [2021-11-07 07:34:47,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:34:47,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:47,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:47,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:34:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:34:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:34:48,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941701275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:48,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:48,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-07 07:34:48,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430244494] [2021-11-07 07:34:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:34:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:34:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:34:48,648 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2021-11-07 07:34:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:49,190 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2021-11-07 07:34:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:34:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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 95 [2021-11-07 07:34:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:49,193 INFO L225 Difference]: With dead ends: 365 [2021-11-07 07:34:49,193 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 07:34:49,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:34:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 07:34:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2021-11-07 07:34:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 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) [2021-11-07 07:34:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2021-11-07 07:34:49,211 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2021-11-07 07:34:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:49,211 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2021-11-07 07:34:49,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2021-11-07 07:34:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2021-11-07 07:34:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 07:34:49,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:49,213 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:49,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:49,439 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash -345123774, now seen corresponding path program 8 times [2021-11-07 07:34:49,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:49,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975331286] [2021-11-07 07:34:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:49,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-07 07:34:49,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:49,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975331286] [2021-11-07 07:34:49,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975331286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:49,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049812624] [2021-11-07 07:34:49,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:34:49,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:49,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:49,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:49,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:34:50,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:34:50,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:34:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-07 07:34:50,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049812624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:50,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:50,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-07 07:34:50,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760465563] [2021-11-07 07:34:50,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:34:50,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:50,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:34:50,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:34:50,552 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2021-11-07 07:34:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:50,989 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2021-11-07 07:34:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:34:50,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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 97 [2021-11-07 07:34:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:50,990 INFO L225 Difference]: With dead ends: 194 [2021-11-07 07:34:50,990 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 07:34:50,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:34:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 07:34:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-07 07:34:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 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) [2021-11-07 07:34:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-11-07 07:34:51,001 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2021-11-07 07:34:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:51,002 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-11-07 07:34:51,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2021-11-07 07:34:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-11-07 07:34:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 07:34:51,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:51,003 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:51,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:51,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:34:51,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2021-11-07 07:34:51,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:51,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572484395] [2021-11-07 07:34:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:51,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 10 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:01,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:01,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572484395] [2021-11-07 07:35:01,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572484395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:01,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079067375] [2021-11-07 07:35:01,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:35:01,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:01,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:35:01,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:35:01,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:35:02,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 07:35:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:35:02,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 187 conjunts are in the unsatisfiable core [2021-11-07 07:35:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:35:02,193 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 15 treesize of output 11 [2021-11-07 07:35:12,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:35:12,356 INFO L354 Elim1Store]: treesize reduction 81, result has 34.1 percent of original size [2021-11-07 07:35:12,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 69 [2021-11-07 07:35:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 5 proven. 167 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:35:12,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079067375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:12,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:35:12,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 28] total 99 [2021-11-07 07:35:12,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818301664] [2021-11-07 07:35:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:35:12,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:35:12,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=9108, Unknown=2, NotChecked=0, Total=9702 [2021-11-07 07:35:12,797 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 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) [2021-11-07 07:35:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:30,017 INFO L93 Difference]: Finished difference Result 337 states and 377 transitions. [2021-11-07 07:35:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:35:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 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 115 [2021-11-07 07:35:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:30,019 INFO L225 Difference]: With dead ends: 337 [2021-11-07 07:35:30,020 INFO L226 Difference]: Without dead ends: 139 [2021-11-07 07:35:30,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 86 SyntacticMatches, 35 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7860 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1576, Invalid=18161, Unknown=3, NotChecked=0, Total=19740 [2021-11-07 07:35:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-07 07:35:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-11-07 07:35:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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) [2021-11-07 07:35:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-11-07 07:35:30,033 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 115 [2021-11-07 07:35:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:30,033 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-11-07 07:35:30,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 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) [2021-11-07 07:35:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-11-07 07:35:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 07:35:30,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:30,036 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:30,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:35:30,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:30,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 10 times [2021-11-07 07:35:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:30,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252744877] [2021-11-07 07:35:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:30,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 10 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:43,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:43,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252744877] [2021-11-07 07:35:43,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252744877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:43,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231472459] [2021-11-07 07:35:43,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:35:43,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:43,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:35:43,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:35:43,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:35:44,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:35:44,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:35:44,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 217 conjunts are in the unsatisfiable core [2021-11-07 07:35:44,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:35:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:35:49,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231472459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:49,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:35:49,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 27] total 112 [2021-11-07 07:35:49,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038501353] [2021-11-07 07:35:49,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-07 07:35:49,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-07 07:35:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=11887, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 07:35:49,703 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 112 states, 112 states have (on average 2.375) internal successors, (266), 112 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:13,369 INFO L93 Difference]: Finished difference Result 463 states and 506 transitions. [2021-11-07 07:36:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:36:13,370 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.375) internal successors, (266), 112 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-07 07:36:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:13,372 INFO L225 Difference]: With dead ends: 463 [2021-11-07 07:36:13,372 INFO L226 Difference]: Without dead ends: 347 [2021-11-07 07:36:13,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 109 SyntacticMatches, 42 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9383 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=2674, Invalid=27082, Unknown=0, NotChecked=0, Total=29756 [2021-11-07 07:36:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-07 07:36:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 270. [2021-11-07 07:36:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0743494423791822) internal successors, (289), 269 states have internal predecessors, (289), 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) [2021-11-07 07:36:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 289 transitions. [2021-11-07 07:36:13,399 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 289 transitions. Word has length 137 [2021-11-07 07:36:13,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:13,400 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 289 transitions. [2021-11-07 07:36:13,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.375) internal successors, (266), 112 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 289 transitions. [2021-11-07 07:36:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 07:36:13,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:13,402 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:13,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:13,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:36:13,611 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash -337097908, now seen corresponding path program 11 times [2021-11-07 07:36:13,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:13,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084100542] [2021-11-07 07:36:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:13,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:36:13,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:13,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084100542] [2021-11-07 07:36:13,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084100542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:13,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462921527] [2021-11-07 07:36:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:36:13,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:13,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:13,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:36:15,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:36:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:36:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:36:15,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462921527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:15,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:15,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-07 07:36:15,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793886398] [2021-11-07 07:36:15,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:36:15,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:36:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:36:15,496 INFO L87 Difference]: Start difference. First operand 270 states and 289 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2021-11-07 07:36:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:16,176 INFO L93 Difference]: Finished difference Result 505 states and 544 transitions. [2021-11-07 07:36:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:36:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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 139 [2021-11-07 07:36:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:16,177 INFO L225 Difference]: With dead ends: 505 [2021-11-07 07:36:16,177 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 07:36:16,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:36:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 07:36:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2021-11-07 07:36:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 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) [2021-11-07 07:36:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2021-11-07 07:36:16,193 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 139 [2021-11-07 07:36:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:16,194 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2021-11-07 07:36:16,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2021-11-07 07:36:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2021-11-07 07:36:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 07:36:16,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:16,195 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:16,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:16,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:36:16,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1612014142, now seen corresponding path program 12 times [2021-11-07 07:36:16,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:16,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652517489] [2021-11-07 07:36:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:16,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:36:16,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:16,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652517489] [2021-11-07 07:36:16,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652517489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:16,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401079435] [2021-11-07 07:36:16,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:36:16,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:16,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:16,615 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:16,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:36:17,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:36:17,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:36:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:36:18,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401079435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:18,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:18,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-07 07:36:18,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358182316] [2021-11-07 07:36:18,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:36:18,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:36:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:36:18,240 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 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) [2021-11-07 07:36:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:18,823 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2021-11-07 07:36:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:36:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 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 157 [2021-11-07 07:36:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:18,824 INFO L225 Difference]: With dead ends: 174 [2021-11-07 07:36:18,825 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 07:36:18,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:36:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 07:36:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-11-07 07:36:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 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) [2021-11-07 07:36:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-11-07 07:36:18,841 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 157 [2021-11-07 07:36:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:18,842 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-11-07 07:36:18,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 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) [2021-11-07 07:36:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-11-07 07:36:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 07:36:18,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:18,844 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-07 07:36:18,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:19,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:36:19,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 13 times [2021-11-07 07:36:19,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:19,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234838447] [2021-11-07 07:36:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:19,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:39,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234838447] [2021-11-07 07:36:39,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234838447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195013057] [2021-11-07 07:36:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:36:39,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:39,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:39,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:36:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:40,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 259 conjunts are in the unsatisfiable core [2021-11-07 07:36:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:36:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195013057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:47,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:47,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 32] total 141 [2021-11-07 07:36:47,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863379772] [2021-11-07 07:36:47,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-11-07 07:36:47,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-11-07 07:36:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=18846, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:36:47,855 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand has 141 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 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) [2021-11-07 07:37:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:25,690 INFO L93 Difference]: Finished difference Result 663 states and 715 transitions. [2021-11-07 07:37:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 07:37:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 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 159 [2021-11-07 07:37:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:25,694 INFO L225 Difference]: With dead ends: 663 [2021-11-07 07:37:25,694 INFO L226 Difference]: Without dead ends: 389 [2021-11-07 07:37:25,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 109 SyntacticMatches, 57 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22480 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=3659, Invalid=50397, Unknown=0, NotChecked=0, Total=54056 [2021-11-07 07:37:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-07 07:37:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 296. [2021-11-07 07:37:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0779661016949154) internal successors, (318), 295 states have internal predecessors, (318), 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) [2021-11-07 07:37:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 318 transitions. [2021-11-07 07:37:25,735 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 318 transitions. Word has length 159 [2021-11-07 07:37:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:25,735 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 318 transitions. [2021-11-07 07:37:25,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 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) [2021-11-07 07:37:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 318 transitions. [2021-11-07 07:37:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 07:37:25,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:25,738 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-07 07:37:25,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:25,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:37:25,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1111700388, now seen corresponding path program 14 times [2021-11-07 07:37:25,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:25,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920088501] [2021-11-07 07:37:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:25,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-07 07:37:26,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:26,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920088501] [2021-11-07 07:37:26,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920088501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:26,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113393739] [2021-11-07 07:37:26,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:37:26,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:26,159 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:37:27,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:37:27,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:37:27,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-07 07:37:28,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113393739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:28,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:28,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-07 07:37:28,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680053595] [2021-11-07 07:37:28,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:37:28,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:37:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:37:28,465 INFO L87 Difference]: Start difference. First operand 296 states and 318 transitions. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 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) [2021-11-07 07:37:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:29,289 INFO L93 Difference]: Finished difference Result 440 states and 478 transitions. [2021-11-07 07:37:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:37:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 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 163 [2021-11-07 07:37:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:29,291 INFO L225 Difference]: With dead ends: 440 [2021-11-07 07:37:29,291 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 07:37:29,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:37:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 07:37:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2021-11-07 07:37:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 181 states have internal predecessors, (192), 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) [2021-11-07 07:37:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 192 transitions. [2021-11-07 07:37:29,314 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 192 transitions. Word has length 163 [2021-11-07 07:37:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:29,314 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 192 transitions. [2021-11-07 07:37:29,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 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) [2021-11-07 07:37:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 192 transitions. [2021-11-07 07:37:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-07 07:37:29,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:29,316 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:29,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:29,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:29,527 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1507735830, now seen corresponding path program 15 times [2021-11-07 07:37:29,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:29,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871910384] [2021-11-07 07:37:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:29,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 69 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:01,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:01,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871910384] [2021-11-07 07:38:01,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871910384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:01,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470893856] [2021-11-07 07:38:01,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:38:01,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:01,954 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:01,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:38:03,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 07:38:03,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:03,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 311 conjunts are in the unsatisfiable core [2021-11-07 07:38:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:03,729 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 15 treesize of output 11 [2021-11-07 07:38:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:38:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:38:20,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:38:20,778 INFO L354 Elim1Store]: treesize reduction 175, result has 31.9 percent of original size [2021-11-07 07:38:20,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 111 [2021-11-07 07:38:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 9 proven. 514 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:38:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470893856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:21,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:21,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 41] total 169 [2021-11-07 07:38:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613771259] [2021-11-07 07:38:21,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-11-07 07:38:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-11-07 07:38:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=27197, Unknown=0, NotChecked=0, Total=28392 [2021-11-07 07:38:21,604 INFO L87 Difference]: Start difference. First operand 182 states and 192 transitions. Second operand has 169 states, 169 states have (on average 2.0710059171597632) internal successors, (350), 169 states have internal predecessors, (350), 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) [2021-11-07 07:39:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:51,098 INFO L93 Difference]: Finished difference Result 662 states and 718 transitions. [2021-11-07 07:39:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-07 07:39:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0710059171597632) internal successors, (350), 169 states have internal predecessors, (350), 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 181 [2021-11-07 07:39:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:51,101 INFO L225 Difference]: With dead ends: 662 [2021-11-07 07:39:51,101 INFO L226 Difference]: Without dead ends: 526 [2021-11-07 07:39:51,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 127 SyntacticMatches, 55 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32482 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=9475, Invalid=86315, Unknown=0, NotChecked=0, Total=95790 [2021-11-07 07:39:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-07 07:39:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 316. [2021-11-07 07:39:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0698412698412698) internal successors, (337), 315 states have internal predecessors, (337), 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) [2021-11-07 07:39:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 337 transitions. [2021-11-07 07:39:51,172 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 337 transitions. Word has length 181 [2021-11-07 07:39:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:51,172 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 337 transitions. [2021-11-07 07:39:51,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0710059171597632) internal successors, (350), 169 states have internal predecessors, (350), 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) [2021-11-07 07:39:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 337 transitions. [2021-11-07 07:39:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 07:39:51,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:51,174 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:51,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:51,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:39:51,387 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1583390776, now seen corresponding path program 16 times [2021-11-07 07:39:51,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:51,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743120800] [2021-11-07 07:39:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:51,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:39:51,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:51,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743120800] [2021-11-07 07:39:51,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743120800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:51,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001698452] [2021-11-07 07:39:51,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:39:51,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:51,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:51,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:51,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:39:53,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:39:53,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:39:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:39:54,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001698452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:54,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:54,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-07 07:39:54,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47116826] [2021-11-07 07:39:54,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:39:54,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:54,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:39:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:54,310 INFO L87 Difference]: Start difference. First operand 316 states and 337 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-11-07 07:39:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:55,209 INFO L93 Difference]: Finished difference Result 659 states and 703 transitions. [2021-11-07 07:39:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:39:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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 183 [2021-11-07 07:39:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:55,210 INFO L225 Difference]: With dead ends: 659 [2021-11-07 07:39:55,211 INFO L226 Difference]: Without dead ends: 215 [2021-11-07 07:39:55,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:39:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-07 07:39:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 204. [2021-11-07 07:39:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 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) [2021-11-07 07:39:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2021-11-07 07:39:55,253 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 183 [2021-11-07 07:39:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:55,253 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2021-11-07 07:39:55,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-11-07 07:39:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2021-11-07 07:39:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-07 07:39:55,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:55,255 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:55,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:55,483 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash -442087860, now seen corresponding path program 17 times [2021-11-07 07:39:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:55,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215583697] [2021-11-07 07:39:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:55,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 80 proven. 624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:38,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215583697] [2021-11-07 07:40:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215583697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960971076] [2021-11-07 07:40:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:40:38,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:38,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:38,108 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:38,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:40:40,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:40:40,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:40,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 345 conjunts are in the unsatisfiable core [2021-11-07 07:40:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:41,549 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 15 treesize of output 11 [2021-11-07 07:40:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:40:41,884 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 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 07:40:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:57,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960971076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:57,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:57,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 45] total 193 [2021-11-07 07:40:57,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849007497] [2021-11-07 07:40:57,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-07 07:40:57,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:57,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-07 07:40:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=35748, Unknown=0, NotChecked=0, Total=37056 [2021-11-07 07:40:57,671 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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) [2021-11-07 07:42:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:32,093 INFO L93 Difference]: Finished difference Result 606 states and 654 transitions. [2021-11-07 07:42:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-07 07:42:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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 203 [2021-11-07 07:42:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:32,097 INFO L225 Difference]: With dead ends: 606 [2021-11-07 07:42:32,097 INFO L226 Difference]: Without dead ends: 600 [2021-11-07 07:42:32,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 137 SyntacticMatches, 66 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40159 ImplicationChecksByTransitivity, 98.8s TimeCoverageRelationStatistics Valid=9570, Invalid=97686, Unknown=0, NotChecked=0, Total=107256 [2021-11-07 07:42:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-07 07:42:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 209. [2021-11-07 07:42:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0576923076923077) internal successors, (220), 208 states have internal predecessors, (220), 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) [2021-11-07 07:42:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 220 transitions. [2021-11-07 07:42:32,167 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 220 transitions. Word has length 203 [2021-11-07 07:42:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:32,167 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 220 transitions. [2021-11-07 07:42:32,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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) [2021-11-07 07:42:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 220 transitions. [2021-11-07 07:42:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-07 07:42:32,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:32,170 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:32,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:32,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:32,383 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash 408565742, now seen corresponding path program 18 times [2021-11-07 07:42:32,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:32,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274854570] [2021-11-07 07:42:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:32,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:42:32,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:32,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274854570] [2021-11-07 07:42:32,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274854570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:32,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083775197] [2021-11-07 07:42:32,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:42:32,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:32,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:32,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:42:35,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-07 07:42:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:42:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:42:36,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083775197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:36,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:36,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-07 07:42:36,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581715692] [2021-11-07 07:42:36,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:42:36,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:42:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:42:36,058 INFO L87 Difference]: Start difference. First operand 209 states and 220 transitions. Second operand has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:37,066 INFO L93 Difference]: Finished difference Result 603 states and 642 transitions. [2021-11-07 07:42:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:42:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-07 07:42:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:37,069 INFO L225 Difference]: With dead ends: 603 [2021-11-07 07:42:37,069 INFO L226 Difference]: Without dead ends: 241 [2021-11-07 07:42:37,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:42:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-07 07:42:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 224. [2021-11-07 07:42:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0493273542600896) internal successors, (234), 223 states have internal predecessors, (234), 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) [2021-11-07 07:42:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 234 transitions. [2021-11-07 07:42:37,114 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 234 transitions. Word has length 205 [2021-11-07 07:42:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:37,114 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 234 transitions. [2021-11-07 07:42:37,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 234 transitions. [2021-11-07 07:42:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-07 07:42:37,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:37,117 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:37,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:37,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:42:37,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1575709280, now seen corresponding path program 19 times [2021-11-07 07:42:37,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:37,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078106242] [2021-11-07 07:42:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:37,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:42:37,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:37,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078106242] [2021-11-07 07:42:37,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078106242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:37,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981703995] [2021-11-07 07:42:37,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:42:37,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:37,710 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:37,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:42:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:42:40,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:42:41,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981703995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:41,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:41,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-07 07:42:41,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429290250] [2021-11-07 07:42:41,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:42:41,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:42:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:42:41,305 INFO L87 Difference]: Start difference. First operand 224 states and 234 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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) [2021-11-07 07:42:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:42,444 INFO L93 Difference]: Finished difference Result 240 states and 250 transitions. [2021-11-07 07:42:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:42:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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 223 [2021-11-07 07:42:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:42,446 INFO L225 Difference]: With dead ends: 240 [2021-11-07 07:42:42,446 INFO L226 Difference]: Without dead ends: 236 [2021-11-07 07:42:42,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:42:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-07 07:42:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 226. [2021-11-07 07:42:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.048888888888889) internal successors, (236), 225 states have internal predecessors, (236), 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) [2021-11-07 07:42:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 236 transitions. [2021-11-07 07:42:42,490 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 236 transitions. Word has length 223 [2021-11-07 07:42:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:42,491 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 236 transitions. [2021-11-07 07:42:42,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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) [2021-11-07 07:42:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 236 transitions. [2021-11-07 07:42:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-07 07:42:42,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:42,492 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:42,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-07 07:42:42,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 07:42:42,693 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1813600510, now seen corresponding path program 20 times [2021-11-07 07:42:42,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:42,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810604995] [2021-11-07 07:42:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:42,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 131 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:43,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:43,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810604995] [2021-11-07 07:43:43,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810604995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:43,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302103765] [2021-11-07 07:43:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:43:43,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:43,838 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:43,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:43:46,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:43:46,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:46,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 385 conjunts are in the unsatisfiable core [2021-11-07 07:43:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 890 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:07,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302103765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:07,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:07,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 47] total 207 [2021-11-07 07:44:07,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034496871] [2021-11-07 07:44:07,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2021-11-07 07:44:07,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2021-11-07 07:44:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1676, Invalid=40966, Unknown=0, NotChecked=0, Total=42642 [2021-11-07 07:44:07,435 INFO L87 Difference]: Start difference. First operand 226 states and 236 transitions. Second operand has 207 states, 207 states have (on average 2.135265700483092) internal successors, (442), 207 states have internal predecessors, (442), 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) [2021-11-07 07:46:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:00,741 INFO L93 Difference]: Finished difference Result 664 states and 711 transitions. [2021-11-07 07:46:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-11-07 07:46:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 2.135265700483092) internal successors, (442), 207 states have internal predecessors, (442), 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 225 [2021-11-07 07:46:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:00,745 INFO L225 Difference]: With dead ends: 664 [2021-11-07 07:46:00,745 INFO L226 Difference]: Without dead ends: 658 [2021-11-07 07:46:00,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 153 SyntacticMatches, 79 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49449 ImplicationChecksByTransitivity, 128.1s TimeCoverageRelationStatistics Valid=11837, Invalid=114543, Unknown=0, NotChecked=0, Total=126380 [2021-11-07 07:46:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-07 07:46:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 231. [2021-11-07 07:46:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0521739130434782) internal successors, (242), 230 states have internal predecessors, (242), 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) [2021-11-07 07:46:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 242 transitions. [2021-11-07 07:46:00,821 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 242 transitions. Word has length 225 [2021-11-07 07:46:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:00,821 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 242 transitions. [2021-11-07 07:46:00,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 2.135265700483092) internal successors, (442), 207 states have internal predecessors, (442), 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) [2021-11-07 07:46:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 242 transitions. [2021-11-07 07:46:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-07 07:46:00,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:00,824 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:00,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:01,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:46:01,037 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash 939868964, now seen corresponding path program 21 times [2021-11-07 07:46:01,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:01,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518995255] [2021-11-07 07:46:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:01,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:46:01,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:01,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518995255] [2021-11-07 07:46:01,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518995255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:01,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943112293] [2021-11-07 07:46:01,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:01,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:01,367 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:01,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:46:04,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:46:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:46:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:46:05,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943112293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:05,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:05,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-07 07:46:05,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120401162] [2021-11-07 07:46:05,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:46:05,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:46:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:46:05,439 INFO L87 Difference]: Start difference. First operand 231 states and 242 transitions. Second operand has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 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) [2021-11-07 07:46:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:06,617 INFO L93 Difference]: Finished difference Result 663 states and 702 transitions. [2021-11-07 07:46:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:46:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 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 227 [2021-11-07 07:46:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:06,619 INFO L225 Difference]: With dead ends: 663 [2021-11-07 07:46:06,619 INFO L226 Difference]: Without dead ends: 263 [2021-11-07 07:46:06,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:46:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-07 07:46:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 246. [2021-11-07 07:46:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 245 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 256 transitions. [2021-11-07 07:46:06,680 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 256 transitions. Word has length 227 [2021-11-07 07:46:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:06,680 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 256 transitions. [2021-11-07 07:46:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 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) [2021-11-07 07:46:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 256 transitions. [2021-11-07 07:46:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-07 07:46:06,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:06,682 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:06,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:06,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:06,907 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1615064042, now seen corresponding path program 22 times [2021-11-07 07:46:06,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:06,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108361140] [2021-11-07 07:46:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:06,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:46:07,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:07,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108361140] [2021-11-07 07:46:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108361140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:07,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224451650] [2021-11-07 07:46:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:07,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:07,336 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:07,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:46:10,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:46:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:46:11,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224451650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:11,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:11,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-07 07:46:11,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2335675] [2021-11-07 07:46:11,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:46:11,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:46:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:46:11,229 INFO L87 Difference]: Start difference. First operand 246 states and 256 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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) [2021-11-07 07:46:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:12,475 INFO L93 Difference]: Finished difference Result 262 states and 272 transitions. [2021-11-07 07:46:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:46:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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 245 [2021-11-07 07:46:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:12,477 INFO L225 Difference]: With dead ends: 262 [2021-11-07 07:46:12,477 INFO L226 Difference]: Without dead ends: 258 [2021-11-07 07:46:12,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=2228, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:46:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-07 07:46:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2021-11-07 07:46:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0445344129554657) internal successors, (258), 247 states have internal predecessors, (258), 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) [2021-11-07 07:46:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 258 transitions. [2021-11-07 07:46:12,547 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 258 transitions. Word has length 245 [2021-11-07 07:46:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 258 transitions. [2021-11-07 07:46:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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) [2021-11-07 07:46:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 258 transitions. [2021-11-07 07:46:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-07 07:46:12,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:12,549 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:12,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 07:46:12,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f20fdf5-bbcd-4a0e-bc89-258e6b51dfff/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:12,762 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1540113608, now seen corresponding path program 23 times [2021-11-07 07:46:12,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:12,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583066312] [2021-11-07 07:46:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:12,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat