./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a --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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 17:27:25,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:27:25,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:27:25,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:27:25,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:27:25,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:27:25,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:27:25,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:27:25,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:27:25,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:27:25,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:27:25,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:27:25,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:27:25,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:27:25,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:27:25,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:27:25,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:27:25,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:27:25,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:27:25,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:27:25,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:27:25,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:27:25,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:27:25,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:27:25,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:27:25,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:27:25,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:27:25,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:27:25,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:27:25,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:27:25,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:27:25,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:27:25,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:27:25,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:27:25,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:27:25,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:27:25,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:27:25,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:27:25,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:27:25,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:27:25,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:27:25,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:27:25,116 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:27:25,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:27:25,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:27:25,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:27:25,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:27:25,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:27:25,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:27:25,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:27:25,120 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:27:25,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:27:25,121 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:27:25,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:27:25,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:27:25,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:27:25,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:27:25,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:27:25,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:27:25,123 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:27:25,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:27:25,123 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:27:25,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:27:25,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:27:25,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:27:25,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:27:25,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:27:25,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:27:25,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:27:25,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:27:25,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:27:25,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:27:25,126 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:27:25,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:27:25,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:27:25,127 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_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-11-21 17:27:25,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:27:25,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:27:25,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:27:25,417 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:27:25,417 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:27:25,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-21 17:27:28,367 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:27:28,612 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:27:28,612 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-21 17:27:28,617 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/data/e7ece82a7/2ebe2a763430424f915f42ffde82d32b/FLAG7977cf2c4 [2022-11-21 17:27:28,632 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/data/e7ece82a7/2ebe2a763430424f915f42ffde82d32b [2022-11-21 17:27:28,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:27:28,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:27:28,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:27:28,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:27:28,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:27:28,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a377650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28, skipping insertion in model container [2022-11-21 17:27:28,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:27:28,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:27:28,879 WARN L237 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_bada2488-1ae8-43ec-b456-00ce8edd0b19/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-21 17:27:28,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:27:28,909 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:27:28,921 WARN L237 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_bada2488-1ae8-43ec-b456-00ce8edd0b19/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-21 17:27:28,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:27:28,943 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:27:28,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28 WrapperNode [2022-11-21 17:27:28,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:27:28,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:27:28,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:27:28,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:27:28,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,976 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-21 17:27:28,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:27:28,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:27:28,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:27:28,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:27:28,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:28,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:29,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:29,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:29,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:29,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:27:29,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:27:29,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:27:29,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:27:29,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (1/1) ... [2022-11-21 17:27:29,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:27:29,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:27:29,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:27:29,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:27:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:27:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 17:27:29,078 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 17:27:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:27:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:27:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:27:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:27:29,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:27:29,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:27:29,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:27:29,157 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:27:29,159 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:27:29,314 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:27:29,322 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:27:29,322 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 17:27:29,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:27:29 BoogieIcfgContainer [2022-11-21 17:27:29,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:27:29,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:27:29,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:27:29,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:27:29,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:27:28" (1/3) ... [2022-11-21 17:27:29,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5f9b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:27:29, skipping insertion in model container [2022-11-21 17:27:29,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:27:28" (2/3) ... [2022-11-21 17:27:29,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5f9b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:27:29, skipping insertion in model container [2022-11-21 17:27:29,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:27:29" (3/3) ... [2022-11-21 17:27:29,334 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-11-21 17:27:29,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:27:29,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:27:29,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:27:29,409 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e2e3e4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:27:29,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 17:27:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:27:29,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:29,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:29,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:27:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:29,426 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2022-11-21 17:27:29,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:27:29,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967362885] [2022-11-21 17:27:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:29,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:27:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:27:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:27:29,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:27:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967362885] [2022-11-21 17:27:29,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967362885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:27:29,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:27:29,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:27:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093813080] [2022-11-21 17:27:29,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:27:29,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:27:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:27:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:27:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:27:29,638 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 17:27:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:29,659 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-11-21 17:27:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:27:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-21 17:27:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:29,669 INFO L225 Difference]: With dead ends: 47 [2022-11-21 17:27:29,669 INFO L226 Difference]: Without dead ends: 21 [2022-11-21 17:27:29,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:27:29,679 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:29,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:27:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-21 17:27:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-21 17:27:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-21 17:27:29,723 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-11-21 17:27:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:29,724 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-21 17:27:29,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 17:27:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-21 17:27:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 17:27:29,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:29,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:27:29,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:27:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2022-11-21 17:27:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:27:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685060993] [2022-11-21 17:27:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:29,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:27:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:27:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 17:27:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:27:30,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:27:30,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685060993] [2022-11-21 17:27:30,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685060993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:27:30,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:27:30,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:27:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506563177] [2022-11-21 17:27:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:27:30,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:27:30,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:27:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:27:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:27:30,095 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:30,147 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-21 17:27:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:27:30,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-21 17:27:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:30,149 INFO L225 Difference]: With dead ends: 26 [2022-11-21 17:27:30,149 INFO L226 Difference]: Without dead ends: 22 [2022-11-21 17:27:30,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:27:30,151 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:30,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:27:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-21 17:27:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-21 17:27:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-21 17:27:30,158 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2022-11-21 17:27:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:30,159 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-21 17:27:30,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-21 17:27:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 17:27:30,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:30,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:30,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:27:30,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:27:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2022-11-21 17:27:30,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:27:30,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85168554] [2022-11-21 17:27:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:30,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:27:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:27:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 17:27:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:27:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:27:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85168554] [2022-11-21 17:27:30,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85168554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:27:30,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:27:30,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:27:30,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188428723] [2022-11-21 17:27:30,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:27:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:27:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:27:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:27:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:27:30,350 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:30,417 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-21 17:27:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:27:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-21 17:27:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:30,419 INFO L225 Difference]: With dead ends: 41 [2022-11-21 17:27:30,420 INFO L226 Difference]: Without dead ends: 25 [2022-11-21 17:27:30,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:27:30,422 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:30,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:27:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-21 17:27:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-11-21 17:27:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 17:27:30,429 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 24 [2022-11-21 17:27:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:30,430 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 17:27:30,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 17:27:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 17:27:30,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:30,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:30,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:27:30,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:27:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2022-11-21 17:27:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:27:30,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807426073] [2022-11-21 17:27:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:30,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:27:30,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:27:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795059823] [2022-11-21 17:27:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:30,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:27:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:27:30,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:27:30,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:27:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:27:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:27:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:27:30,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:27:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:30,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:27:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807426073] [2022-11-21 17:27:30,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:27:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795059823] [2022-11-21 17:27:30,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795059823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:27:30,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:27:30,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-21 17:27:30,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491865850] [2022-11-21 17:27:30,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:27:30,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:27:30,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:27:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:27:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-21 17:27:30,992 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:27:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:31,276 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-11-21 17:27:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:27:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-11-21 17:27:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:31,279 INFO L225 Difference]: With dead ends: 71 [2022-11-21 17:27:31,280 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 17:27:31,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:27:31,281 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:31,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 76 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:27:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 17:27:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-21 17:27:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-21 17:27:31,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2022-11-21 17:27:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:31,289 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-21 17:27:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:27:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-21 17:27:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:27:31,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:31,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:31,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 17:27:31,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:27:31,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:27:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1559224519, now seen corresponding path program 2 times [2022-11-21 17:27:31,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:27:31,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405523758] [2022-11-21 17:27:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:27:31,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:27:31,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665395350] [2022-11-21 17:27:31,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:27:31,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:27:31,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:27:31,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:27:31,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:27:31,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:27:31,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:27:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 17:27:31,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:27:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:27:31,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:27:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:27:31,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:27:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405523758] [2022-11-21 17:27:31,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:27:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665395350] [2022-11-21 17:27:31,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665395350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:27:31,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:27:31,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-21 17:27:31,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721128734] [2022-11-21 17:27:31,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:27:31,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:27:31,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:27:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:27:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:27:31,824 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:27:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:32,001 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-11-21 17:27:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 17:27:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-21 17:27:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:32,004 INFO L225 Difference]: With dead ends: 39 [2022-11-21 17:27:32,004 INFO L226 Difference]: Without dead ends: 35 [2022-11-21 17:27:32,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:27:32,007 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:32,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:27:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-21 17:27:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-21 17:27:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:27:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-21 17:27:32,028 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2022-11-21 17:27:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:32,028 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-21 17:27:32,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:27:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-21 17:27:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 17:27:32,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:32,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:32,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:27:32,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:27:32,236 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:27:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1722352949, now seen corresponding path program 3 times [2022-11-21 17:27:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:27:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265885414] [2022-11-21 17:27:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:32,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:27:32,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:27:32,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793449858] [2022-11-21 17:27:32,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:27:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:27:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:27:32,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:27:32,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:27:32,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 17:27:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:27:32,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-21 17:27:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:27:32,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:27:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-11-21 17:27:32,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-21 17:27:32,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-21 17:27:32,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-21 17:27:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-11-21 17:27:32,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-21 17:27:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-21 17:27:32,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 22 [2022-11-21 17:27:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2022-11-21 17:27:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,856 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-21 17:27:32,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 34 [2022-11-21 17:27:32,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:32,886 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-21 17:27:32,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 60 [2022-11-21 17:27:33,845 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-21 17:27:33,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 334 treesize of output 217 [2022-11-21 17:27:33,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-21 17:27:33,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-21 17:27:33,931 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-21 17:27:33,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 219 [2022-11-21 17:27:33,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,000 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-21 17:27:34,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 160 [2022-11-21 17:27:34,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:34,094 INFO L321 Elim1Store]: treesize reduction 54, result has 21.7 percent of original size [2022-11-21 17:27:34,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 82 [2022-11-21 17:27:34,273 INFO L321 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2022-11-21 17:27:34,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 178 [2022-11-21 17:27:34,308 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-21 17:27:34,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 176 [2022-11-21 17:27:34,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 224 [2022-11-21 17:27:34,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-21 17:27:36,629 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:27:36,630 INFO L350 Elim1Store]: Elim1 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 223 treesize of output 181 [2022-11-21 17:27:36,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:36,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:36,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:27:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:27:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:36,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:27:36,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 206 treesize of output 440 [2022-11-21 17:27:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:27:36,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:27:36,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:37,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:27:37,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 296 treesize of output 478 [2022-11-21 17:29:18,901 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:19,464 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:21,214 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:22,533 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:23,132 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:23,725 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:24,007 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:24,933 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:25,463 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 17:29:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:33,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:34,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:29:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265885414] [2022-11-21 17:29:34,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:29:34,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793449858] [2022-11-21 17:29:34,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793449858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:29:34,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:29:34,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-21 17:29:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113390762] [2022-11-21 17:29:34,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:34,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 17:29:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:29:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 17:29:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=909, Unknown=1, NotChecked=0, Total=1056 [2022-11-21 17:29:34,178 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:29:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:36,114 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-21 17:29:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 17:29:36,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-21 17:29:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:36,116 INFO L225 Difference]: With dead ends: 58 [2022-11-21 17:29:36,116 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 17:29:36,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=222, Invalid=1417, Unknown=1, NotChecked=0, Total=1640 [2022-11-21 17:29:36,118 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:36,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 232 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 17:29:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 17:29:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-11-21 17:29:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:29:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-11-21 17:29:36,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 34 [2022-11-21 17:29:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:36,133 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-11-21 17:29:36,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:29:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-11-21 17:29:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 17:29:36,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:36,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:36,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:29:36,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 17:29:36,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:29:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1565541619, now seen corresponding path program 4 times [2022-11-21 17:29:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:29:36,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103483763] [2022-11-21 17:29:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:36,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:29:36,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:29:36,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134705378] [2022-11-21 17:29:36,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:29:36,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:29:36,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:29:36,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:29:36,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:29:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:29:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:36,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:29:36,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:29:36,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103483763] [2022-11-21 17:29:36,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:29:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134705378] [2022-11-21 17:29:36,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134705378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:29:36,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:29:36,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-21 17:29:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257682447] [2022-11-21 17:29:36,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:36,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:29:36,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:29:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:29:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:29:36,731 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:29:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:36,912 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-11-21 17:29:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:29:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-11-21 17:29:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:36,914 INFO L225 Difference]: With dead ends: 103 [2022-11-21 17:29:36,914 INFO L226 Difference]: Without dead ends: 89 [2022-11-21 17:29:36,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:29:36,915 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:36,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 118 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:29:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-21 17:29:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2022-11-21 17:29:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 17:29:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-11-21 17:29:36,943 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 36 [2022-11-21 17:29:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:36,944 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-11-21 17:29:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:29:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-11-21 17:29:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 17:29:36,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:36,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:36,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:29:37,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 17:29:37,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:29:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash -285980785, now seen corresponding path program 5 times [2022-11-21 17:29:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:29:37,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522049964] [2022-11-21 17:29:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:29:37,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:29:37,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100404670] [2022-11-21 17:29:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:29:37,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:37,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:29:37,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:29:37,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:29:37,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 17:29:37,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:37,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-21 17:29:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:37,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:29:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-11-21 17:29:37,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-21 17:29:37,507 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 31 [2022-11-21 17:29:37,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-11-21 17:29:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-11-21 17:29:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2022-11-21 17:29:37,821 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2022-11-21 17:29:37,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 102 [2022-11-21 17:29:37,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 45 [2022-11-21 17:29:37,856 INFO L321 Elim1Store]: treesize reduction 51, result has 8.9 percent of original size [2022-11-21 17:29:37,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 81 [2022-11-21 17:29:37,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-21 17:29:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:37,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 47 [2022-11-21 17:29:37,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2022-11-21 17:29:37,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 17:29:38,169 INFO L321 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2022-11-21 17:29:38,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 145 [2022-11-21 17:29:38,194 INFO L321 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2022-11-21 17:29:38,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 150 [2022-11-21 17:29:38,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 101 [2022-11-21 17:29:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:38,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-21 17:29:38,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-21 17:29:38,250 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 11 [2022-11-21 17:29:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 17:29:39,113 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-21 17:29:39,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 361 treesize of output 238 [2022-11-21 17:29:39,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-21 17:29:39,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-21 17:29:39,208 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-21 17:29:39,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 196 treesize of output 235 [2022-11-21 17:29:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,328 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2022-11-21 17:29:39,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 191 [2022-11-21 17:29:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:39,438 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2022-11-21 17:29:39,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 91 [2022-11-21 17:29:39,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 93 [2022-11-21 17:29:39,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2022-11-21 17:29:39,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 56 [2022-11-21 17:29:41,332 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:29:41,332 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 153 [2022-11-21 17:29:41,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:29:41,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 153 treesize of output 239 [2022-11-21 17:29:41,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:29:41,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 170 treesize of output 248 [2022-11-21 17:29:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:29:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522049964] [2022-11-21 17:29:44,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:29:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100404670] [2022-11-21 17:29:44,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100404670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:29:44,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:29:44,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-11-21 17:29:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800686970] [2022-11-21 17:29:44,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 17:29:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:29:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 17:29:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1180, Unknown=7, NotChecked=0, Total=1332 [2022-11-21 17:29:44,640 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:29:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:47,365 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-11-21 17:29:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:29:47,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-11-21 17:29:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:47,367 INFO L225 Difference]: With dead ends: 100 [2022-11-21 17:29:47,367 INFO L226 Difference]: Without dead ends: 96 [2022-11-21 17:29:47,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=288, Invalid=2255, Unknown=7, NotChecked=0, Total=2550 [2022-11-21 17:29:47,369 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:47,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 287 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 17:29:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-21 17:29:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2022-11-21 17:29:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 17:29:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-11-21 17:29:47,395 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 38 [2022-11-21 17:29:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:47,395 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-11-21 17:29:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:29:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-11-21 17:29:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 17:29:47,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:47,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:47,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:29:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:47,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:29:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 103605969, now seen corresponding path program 6 times [2022-11-21 17:29:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:29:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882710466] [2022-11-21 17:29:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:47,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:29:47,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:29:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557204256] [2022-11-21 17:29:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 17:29:47,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:29:47,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:29:47,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:29:47,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-21 17:29:47,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 17:29:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:48,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:29:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:29:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882710466] [2022-11-21 17:29:48,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:29:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557204256] [2022-11-21 17:29:48,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557204256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:29:48,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:29:48,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-21 17:29:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711122270] [2022-11-21 17:29:48,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:29:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:29:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:29:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:29:48,165 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:29:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:48,498 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2022-11-21 17:29:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:29:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-11-21 17:29:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:48,500 INFO L225 Difference]: With dead ends: 143 [2022-11-21 17:29:48,500 INFO L226 Difference]: Without dead ends: 127 [2022-11-21 17:29:48,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2022-11-21 17:29:48,502 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 94 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:48,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 157 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:29:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-21 17:29:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2022-11-21 17:29:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 17:29:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-11-21 17:29:48,543 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 40 [2022-11-21 17:29:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:48,544 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-11-21 17:29:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:29:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-11-21 17:29:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 17:29:48,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:48,545 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:48,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-21 17:29:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:48,751 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:29:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1011334033, now seen corresponding path program 7 times [2022-11-21 17:29:48,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:29:48,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129972038] [2022-11-21 17:29:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:29:48,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:29:48,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454020431] [2022-11-21 17:29:48,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:29:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:29:48,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:29:48,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:29:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:29:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 17:29:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:29:49,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:29:49,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129972038] [2022-11-21 17:29:49,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:29:49,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454020431] [2022-11-21 17:29:49,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454020431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:29:49,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:29:49,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-21 17:29:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106740454] [2022-11-21 17:29:49,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:29:49,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:29:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:29:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:29:49,173 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:29:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:49,493 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-11-21 17:29:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 17:29:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-11-21 17:29:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:49,495 INFO L225 Difference]: With dead ends: 122 [2022-11-21 17:29:49,495 INFO L226 Difference]: Without dead ends: 118 [2022-11-21 17:29:49,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-21 17:29:49,496 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:49,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 155 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:29:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-21 17:29:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 91. [2022-11-21 17:29:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 78 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 17:29:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-11-21 17:29:49,534 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 40 [2022-11-21 17:29:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:49,534 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-11-21 17:29:49,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:29:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-11-21 17:29:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-21 17:29:49,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:49,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:49,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 17:29:49,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 17:29:49,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:29:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash -943992564, now seen corresponding path program 1 times [2022-11-21 17:29:49,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:29:49,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902512599] [2022-11-21 17:29:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:29:49,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:29:49,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650892269] [2022-11-21 17:29:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:49,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:29:49,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:29:49,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:29:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:29:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-21 17:29:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:49,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:29:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-11-21 17:29:50,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-21 17:29:50,028 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 31 [2022-11-21 17:29:50,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 67 [2022-11-21 17:29:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2022-11-21 17:29:50,916 INFO L321 Elim1Store]: treesize reduction 30, result has 14.3 percent of original size [2022-11-21 17:29:50,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 87 [2022-11-21 17:29:50,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-11-21 17:29:50,951 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-21 17:29:50,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 77 [2022-11-21 17:29:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 44 [2022-11-21 17:29:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:50,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:50,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-11-21 17:29:50,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-21 17:29:51,507 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-21 17:29:51,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 321 treesize of output 206 [2022-11-21 17:29:51,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-21 17:29:51,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-21 17:29:51,576 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-21 17:29:51,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2022-11-21 17:29:51,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:51,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:51,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:51,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 44 [2022-11-21 17:29:51,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:51,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:51,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:51,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:51,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-21 17:29:51,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-11-21 17:29:51,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 63 [2022-11-21 17:29:51,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2022-11-21 17:29:52,347 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 17:29:52,347 INFO L350 Elim1Store]: Elim1 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 154 treesize of output 136 [2022-11-21 17:29:52,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:52,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:52,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 71 [2022-11-21 17:29:52,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:52,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:52,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2022-11-21 17:29:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:52,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:52,821 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_649 (Array Int Int)) (v_ArrVal_651 (Array Int Int))) (= 0 (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_649) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_651) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)))))))) is different from false [2022-11-21 17:29:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:29:53,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902512599] [2022-11-21 17:29:53,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:29:53,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650892269] [2022-11-21 17:29:53,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650892269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:29:53,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:29:53,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-11-21 17:29:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039102808] [2022-11-21 17:29:53,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:53,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 17:29:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:29:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 17:29:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1114, Unknown=1, NotChecked=68, Total=1332 [2022-11-21 17:29:53,003 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:29:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:54,935 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-11-21 17:29:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 17:29:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-11-21 17:29:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:54,937 INFO L225 Difference]: With dead ends: 97 [2022-11-21 17:29:54,937 INFO L226 Difference]: Without dead ends: 69 [2022-11-21 17:29:54,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=328, Invalid=2225, Unknown=1, NotChecked=98, Total=2652 [2022-11-21 17:29:54,939 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:54,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 229 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 17:29:54,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-21 17:29:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-21 17:29:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.1) internal successors, (66), 60 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:29:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-11-21 17:29:54,966 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 42 [2022-11-21 17:29:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:54,966 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-11-21 17:29:54,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 17:29:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-11-21 17:29:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-21 17:29:54,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:54,968 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:54,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 17:29:55,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 17:29:55,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:29:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1282630227, now seen corresponding path program 8 times [2022-11-21 17:29:55,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:29:55,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116743448] [2022-11-21 17:29:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:29:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:29:55,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:29:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130104247] [2022-11-21 17:29:55,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:29:55,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:29:55,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:29:55,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:29:55,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:29:55,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:29:55,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:55,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-21 17:29:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:55,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:29:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:55,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-11-21 17:29:55,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-21 17:29:55,702 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 31 [2022-11-21 17:29:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:55,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-11-21 17:29:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,046 INFO L321 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2022-11-21 17:29:56,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 74 [2022-11-21 17:29:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,271 INFO L321 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-11-21 17:29:56,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 106 treesize of output 104 [2022-11-21 17:29:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:56,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:56,638 INFO L321 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2022-11-21 17:29:56,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 124 treesize of output 131 [2022-11-21 17:29:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:57,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:57,896 INFO L321 Elim1Store]: treesize reduction 800, result has 12.5 percent of original size [2022-11-21 17:29:57,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 19 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 98 case distinctions, treesize of input 194 treesize of output 245 [2022-11-21 17:30:01,787 INFO L321 Elim1Store]: treesize reduction 484, result has 39.0 percent of original size [2022-11-21 17:30:01,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 10 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 280 treesize of output 424 [2022-11-21 17:30:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:30:06,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:10,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:30:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116743448] [2022-11-21 17:30:10,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:30:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130104247] [2022-11-21 17:30:10,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130104247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:30:10,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:30:10,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-11-21 17:30:10,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115627828] [2022-11-21 17:30:10,354 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:10,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 17:30:10,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:30:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 17:30:10,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 17:30:10,356 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:30:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:14,479 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-11-21 17:30:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 17:30:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-11-21 17:30:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:14,481 INFO L225 Difference]: With dead ends: 98 [2022-11-21 17:30:14,481 INFO L226 Difference]: Without dead ends: 94 [2022-11-21 17:30:14,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=336, Invalid=2856, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 17:30:14,482 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:14,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 222 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 17:30:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-21 17:30:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2022-11-21 17:30:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 17:30:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-11-21 17:30:14,513 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 42 [2022-11-21 17:30:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:14,513 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-11-21 17:30:14,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:30:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-11-21 17:30:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 17:30:14,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:14,515 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:14,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:30:14,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 17:30:14,722 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:30:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1773046770, now seen corresponding path program 2 times [2022-11-21 17:30:14,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:30:14,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625164253] [2022-11-21 17:30:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:30:14,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:30:14,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:30:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459681686] [2022-11-21 17:30:14,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:30:14,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:30:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:30:14,749 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:30:14,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 17:30:14,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:30:14,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:30:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:30:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 17:30:15,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 17:30:15,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:30:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625164253] [2022-11-21 17:30:15,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:30:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459681686] [2022-11-21 17:30:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459681686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:30:15,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:30:15,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-21 17:30:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261397080] [2022-11-21 17:30:15,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:30:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:30:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:30:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:30:15,108 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:30:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:15,355 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-11-21 17:30:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 17:30:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-11-21 17:30:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:15,356 INFO L225 Difference]: With dead ends: 94 [2022-11-21 17:30:15,356 INFO L226 Difference]: Without dead ends: 90 [2022-11-21 17:30:15,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-11-21 17:30:15,358 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:15,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 120 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:30:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-21 17:30:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-11-21 17:30:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 17:30:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-11-21 17:30:15,387 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 44 [2022-11-21 17:30:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:15,388 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-11-21 17:30:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:30:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-11-21 17:30:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 17:30:15,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:15,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:15,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 17:30:15,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 17:30:15,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:30:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 5267605, now seen corresponding path program 9 times [2022-11-21 17:30:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:30:15,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934734582] [2022-11-21 17:30:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:30:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:30:15,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:30:15,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868592991] [2022-11-21 17:30:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:30:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:30:15,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:30:15,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:30:15,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 17:30:15,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-21 17:30:15,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:30:15,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:30:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:30:16,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:30:16,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:30:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934734582] [2022-11-21 17:30:16,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:30:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868592991] [2022-11-21 17:30:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868592991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:30:16,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:30:16,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-21 17:30:16,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282431981] [2022-11-21 17:30:16,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 17:30:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:30:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 17:30:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:30:16,186 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:30:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:16,610 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2022-11-21 17:30:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 17:30:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-11-21 17:30:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:16,611 INFO L225 Difference]: With dead ends: 133 [2022-11-21 17:30:16,611 INFO L226 Difference]: Without dead ends: 115 [2022-11-21 17:30:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 17:30:16,613 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 135 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:16,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 143 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:30:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-21 17:30:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2022-11-21 17:30:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 77 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 17:30:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-11-21 17:30:16,658 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 44 [2022-11-21 17:30:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:16,658 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-11-21 17:30:16,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:30:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-11-21 17:30:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 17:30:16,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:16,659 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:16,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 17:30:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 17:30:16,866 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:30:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:16,866 INFO L85 PathProgramCache]: Analyzing trace with hash 453576021, now seen corresponding path program 10 times [2022-11-21 17:30:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:30:16,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292901730] [2022-11-21 17:30:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:30:16,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:30:16,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:30:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790551219] [2022-11-21 17:30:16,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:30:16,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:30:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:30:16,881 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:30:16,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 17:30:17,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:30:17,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:30:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:30:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:30:17,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:30:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:30:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292901730] [2022-11-21 17:30:17,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:30:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790551219] [2022-11-21 17:30:17,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790551219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:30:17,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:30:17,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-21 17:30:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870666286] [2022-11-21 17:30:17,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:17,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 17:30:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:30:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 17:30:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:30:17,417 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:30:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:17,816 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-11-21 17:30:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 17:30:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-11-21 17:30:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:17,817 INFO L225 Difference]: With dead ends: 114 [2022-11-21 17:30:17,817 INFO L226 Difference]: Without dead ends: 110 [2022-11-21 17:30:17,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 17:30:17,819 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:17,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 165 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:30:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-21 17:30:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2022-11-21 17:30:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 17:30:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2022-11-21 17:30:17,857 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 44 [2022-11-21 17:30:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:17,857 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2022-11-21 17:30:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:30:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2022-11-21 17:30:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 17:30:17,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:17,858 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:17,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 17:30:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 17:30:18,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:30:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1257303952, now seen corresponding path program 3 times [2022-11-21 17:30:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:30:18,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922548181] [2022-11-21 17:30:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:30:18,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:30:18,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:30:18,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11313082] [2022-11-21 17:30:18,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:30:18,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:30:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:30:18,080 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:30:18,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bada2488-1ae8-43ec-b456-00ce8edd0b19/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 17:30:18,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-21 17:30:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:30:18,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-21 17:30:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:18,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:30:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:18,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-11-21 17:30:18,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-21 17:30:18,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-21 17:30:18,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-21 17:30:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:18,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-11-21 17:30:18,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:19,025 INFO L321 Elim1Store]: treesize reduction 312, result has 13.1 percent of original size [2022-11-21 17:30:19,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 82 treesize of output 74 [2022-11-21 17:30:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:19,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:19,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:19,342 INFO L321 Elim1Store]: treesize reduction 432, result has 9.8 percent of original size [2022-11-21 17:30:19,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 197 treesize of output 117 [2022-11-21 17:30:20,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:20,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:20,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:20,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:20,528 INFO L321 Elim1Store]: treesize reduction 694, result has 9.8 percent of original size [2022-11-21 17:30:20,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 14 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 71 case distinctions, treesize of input 190 treesize of output 208 [2022-11-21 17:30:23,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:23,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:30:26,242 INFO L321 Elim1Store]: treesize reduction 2848, result has 10.7 percent of original size [2022-11-21 17:30:26,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 9 disjoint index pairs (out of 171 index pairs), introduced 22 new quantified variables, introduced 185 case distinctions, treesize of input 424 treesize of output 544 [2022-11-21 17:30:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:36,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:31:04,484 WARN L233 SmtUtils]: Spent 28.09s on a formula simplification. DAG size of input: 1166 DAG size of output: 588 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-21 17:31:04,488 INFO L321 Elim1Store]: treesize reduction 3968, result has 35.9 percent of original size [2022-11-21 17:31:04,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 3 disjoint index pairs (out of 496 index pairs), introduced 35 new quantified variables, introduced 496 case distinctions, treesize of input 586 treesize of output 2441