./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 --- 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-2329fc7 [2022-12-14 12:59:40,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:59:40,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:59:40,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:59:40,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:59:40,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:59:40,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:59:40,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:59:40,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:59:40,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:59:40,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:59:40,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:59:40,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:59:40,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:59:40,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:59:40,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:59:40,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:59:40,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:59:40,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:59:40,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:59:40,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:59:40,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:59:40,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:59:40,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:59:40,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:59:40,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:59:40,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:59:40,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:59:40,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:59:40,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:59:40,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:59:40,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:59:40,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:59:40,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:59:40,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:59:40,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:59:40,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:59:40,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:59:40,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:59:40,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:59:40,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:59:40,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:59:40,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:59:40,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:59:40,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:59:40,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:59:40,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:59:40,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:59:40,197 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:59:40,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:59:40,197 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:59:40,198 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:59:40,198 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:59:40,198 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:59:40,198 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:59:40,198 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:59:40,198 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:59:40,199 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:59:40,199 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:59:40,199 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:59:40,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:59:40,200 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:59:40,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:59:40,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:59:40,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:59:40,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:59:40,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:59:40,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:59:40,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:59:40,202 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:59:40,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:59:40,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:59:40,202 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:59:40,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:59:40,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:59:40,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:59:40,203 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_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 [2022-12-14 12:59:40,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:59:40,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:59:40,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:59:40,423 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:59:40,423 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:59:40,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/ss1.c [2022-12-14 12:59:42,916 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:59:43,075 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:59:43,076 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/sv-benchmarks/c/array-fpi/ss1.c [2022-12-14 12:59:43,080 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/data/f94dba04d/75b80a8ca91940e3936a3d9a3ef39e3c/FLAG9f47f1256 [2022-12-14 12:59:43,478 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/data/f94dba04d/75b80a8ca91940e3936a3d9a3ef39e3c [2022-12-14 12:59:43,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:59:43,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:59:43,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:59:43,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:59:43,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:59:43,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1e545f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43, skipping insertion in model container [2022-12-14 12:59:43,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:59:43,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:59:43,595 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_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-12-14 12:59:43,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:59:43,615 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:59:43,623 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_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-12-14 12:59:43,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:59:43,638 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:59:43,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43 WrapperNode [2022-12-14 12:59:43,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:59:43,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:59:43,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:59:43,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:59:43,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,661 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-12-14 12:59:43,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:59:43,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:59:43,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:59:43,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:59:43,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:59:43,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:59:43,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:59:43,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:59:43,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (1/1) ... [2022-12-14 12:59:43,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:59:43,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:43,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:59:43,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:59:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:59:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:59:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:59:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:59:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:59:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:59:43,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:59:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:59:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:59:43,786 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:59:43,787 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:59:43,911 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:59:43,942 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:59:43,942 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 12:59:43,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:59:43 BoogieIcfgContainer [2022-12-14 12:59:43,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:59:43,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:59:43,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:59:43,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:59:43,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:59:43" (1/3) ... [2022-12-14 12:59:43,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be1c81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:59:43, skipping insertion in model container [2022-12-14 12:59:43,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:59:43" (2/3) ... [2022-12-14 12:59:43,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be1c81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:59:43, skipping insertion in model container [2022-12-14 12:59:43,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:59:43" (3/3) ... [2022-12-14 12:59:43,950 INFO L112 eAbstractionObserver]: Analyzing ICFG ss1.c [2022-12-14 12:59:43,963 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:59:43,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:59:43,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:59:44,002 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c5ad710, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:59:44,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:59:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:59:44,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:44,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:44,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 581057961, now seen corresponding path program 1 times [2022-12-14 12:59:44,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434575965] [2022-12-14 12:59:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:44,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:44,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:59:44,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434575965] [2022-12-14 12:59:44,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:59:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79958956] [2022-12-14 12:59:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:44,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:44,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:44,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:59:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:59:44,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:59:44,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:59:44,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79958956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:59:44,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:59:44,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:59:44,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15937696] [2022-12-14 12:59:44,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:59:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:59:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:59:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:59:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:59:44,277 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:44,314 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-12-14 12:59:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:59:44,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 12:59:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:44,321 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:59:44,321 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 12:59:44,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:59:44,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:44,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:59:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 12:59:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 12:59:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-12-14 12:59:44,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-12-14 12:59:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:44,358 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-12-14 12:59:44,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-12-14 12:59:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:59:44,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:44,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:44,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:59:44,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 12:59:44,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 431603023, now seen corresponding path program 1 times [2022-12-14 12:59:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:44,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159385947] [2022-12-14 12:59:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:44,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:44,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:59:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559452265] [2022-12-14 12:59:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:44,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:44,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:59:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:59:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:59:44,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:59:44,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:59:44,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159385947] [2022-12-14 12:59:44,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:59:44,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559452265] [2022-12-14 12:59:44,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559452265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:59:44,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:59:44,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:59:44,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201349711] [2022-12-14 12:59:44,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:59:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:59:44,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:59:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:59:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:59:44,840 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:44,872 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-12-14 12:59:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:59:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:59:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:44,873 INFO L225 Difference]: With dead ends: 18 [2022-12-14 12:59:44,874 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 12:59:44,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:59:44,875 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:44,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:59:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 12:59:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 12:59:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 12:59:44,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-12-14 12:59:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:44,881 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 12:59:44,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 12:59:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:59:44,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:44,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:44,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:59:45,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:45,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash 792964949, now seen corresponding path program 1 times [2022-12-14 12:59:45,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267440086] [2022-12-14 12:59:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:45,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:59:45,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609772298] [2022-12-14 12:59:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:45,157 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:45,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:59:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 12:59:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:45,259 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 [2022-12-14 12:59:45,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:59:45,305 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 19 treesize of output 18 [2022-12-14 12:59:45,383 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 36 treesize of output 23 [2022-12-14 12:59:45,451 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 36 treesize of output 23 [2022-12-14 12:59:45,520 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 42 treesize of output 25 [2022-12-14 12:59:45,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 35 [2022-12-14 12:59:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:59:45,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:59:45,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:59:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267440086] [2022-12-14 12:59:45,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:59:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609772298] [2022-12-14 12:59:45,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609772298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:59:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373689319] [2022-12-14 12:59:46,010 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:59:46,010 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:59:46,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:59:46,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:59:46,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:59:46,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,082 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:59:46,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:59:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,153 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:59:46,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:59:46,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 12:59:46,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 12:59:46,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:46,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:46,361 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 12:59:46,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 12:59:46,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:59:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:46,494 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:46,494 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 21 treesize of output 29 [2022-12-14 12:59:46,559 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:59:46,559 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 26 treesize of output 54 [2022-12-14 12:59:46,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:46,612 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:46,612 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 31 treesize of output 34 [2022-12-14 12:59:46,674 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:59:46,674 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 31 treesize of output 54 [2022-12-14 12:59:46,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:46,733 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:59:46,733 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 26 treesize of output 34 [2022-12-14 12:59:46,791 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:59:46,791 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 26 treesize of output 54 [2022-12-14 12:59:46,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:59:47,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:59:47,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:59:47,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:59:47,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-12-14 12:59:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457670490] [2022-12-14 12:59:47,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:59:47,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:59:47,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:59:47,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:59:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:59:47,214 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:47,678 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-12-14 12:59:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:59:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 12:59:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:47,680 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:59:47,680 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 12:59:47,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:59:47,681 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:47,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:59:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 12:59:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-12-14 12:59:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-12-14 12:59:47,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-12-14 12:59:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:47,685 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-12-14 12:59:47,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-12-14 12:59:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:59:47,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:47,685 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:47,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:59:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:47,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash -911807493, now seen corresponding path program 2 times [2022-12-14 12:59:47,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:47,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286933404] [2022-12-14 12:59:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:47,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:47,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:59:47,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572263643] [2022-12-14 12:59:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:59:47,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:47,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:47,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:59:47,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:59:47,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:59:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:59:47,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:59:48,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:59:48,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:59:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286933404] [2022-12-14 12:59:48,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:59:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572263643] [2022-12-14 12:59:48,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572263643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:59:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235642883] [2022-12-14 12:59:48,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:59:48,041 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:59:48,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:59:48,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:59:48,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:59:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,115 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:59:48,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-12-14 12:59:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,187 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:59:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:59:48,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:59:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:59:48,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:48,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:48,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:48,383 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:59:48,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:59:48,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:59:48,514 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:48,514 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 21 treesize of output 29 [2022-12-14 12:59:48,571 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:59:48,572 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 26 treesize of output 54 [2022-12-14 12:59:48,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:48,613 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:48,613 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 21 treesize of output 29 [2022-12-14 12:59:48,664 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:59:48,664 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 31 treesize of output 54 [2022-12-14 12:59:48,691 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:48,691 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 21 treesize of output 29 [2022-12-14 12:59:48,738 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:59:48,738 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 26 treesize of output 54 [2022-12-14 12:59:48,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:59:49,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '418#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:59:49,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:59:49,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:59:49,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 12:59:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560917148] [2022-12-14 12:59:49,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:59:49,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:59:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:59:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:59:49,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:59:49,012 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:49,102 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-12-14 12:59:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:59:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:59:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:49,102 INFO L225 Difference]: With dead ends: 31 [2022-12-14 12:59:49,103 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 12:59:49,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:59:49,104 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:49,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:59:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 12:59:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-12-14 12:59:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-12-14 12:59:49,111 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-12-14 12:59:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:49,111 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-12-14 12:59:49,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-12-14 12:59:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:59:49,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:49,112 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:49,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:59:49,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:49,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:49,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1188195942, now seen corresponding path program 3 times [2022-12-14 12:59:49,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120774567] [2022-12-14 12:59:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:49,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:59:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918191397] [2022-12-14 12:59:49,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:59:49,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:49,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:49,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:49,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:59:49,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:59:49,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:59:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:59:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:59:49,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:59:49,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:59:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120774567] [2022-12-14 12:59:49,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:59:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918191397] [2022-12-14 12:59:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918191397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:59:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48721291] [2022-12-14 12:59:49,470 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:59:49,470 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:59:49,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:59:49,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:59:49,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:59:49,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,533 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:59:49,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:59:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 12:59:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:59:49,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 12:59:49,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:49,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:49,705 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 12:59:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 12:59:49,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:59:49,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:49,795 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:49,796 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 21 treesize of output 29 [2022-12-14 12:59:49,844 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:59:49,844 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 26 treesize of output 54 [2022-12-14 12:59:49,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:49,885 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:59:49,885 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 31 treesize of output 34 [2022-12-14 12:59:49,927 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:59:49,928 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 31 treesize of output 54 [2022-12-14 12:59:49,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:49,969 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:59:49,969 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 26 treesize of output 34 [2022-12-14 12:59:50,014 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:59:50,015 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 26 treesize of output 54 [2022-12-14 12:59:50,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:59:50,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:59:50,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:59:50,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:59:50,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 12:59:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810328608] [2022-12-14 12:59:50,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:59:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:59:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:59:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:59:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:59:50,242 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:50,287 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-12-14 12:59:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:59:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:59:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:50,287 INFO L225 Difference]: With dead ends: 33 [2022-12-14 12:59:50,287 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 12:59:50,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:59:50,288 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:50,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:59:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 12:59:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 12:59:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-14 12:59:50,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-12-14 12:59:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:50,291 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-14 12:59:50,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:59:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-14 12:59:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 12:59:50,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:50,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:50,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:59:50,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:50,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:50,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1993429225, now seen corresponding path program 4 times [2022-12-14 12:59:50,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:50,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821453304] [2022-12-14 12:59:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:50,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:50,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:59:50,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216877718] [2022-12-14 12:59:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:59:50,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:50,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:50,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:50,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:59:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-14 12:59:50,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:50,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:59:50,591 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 [2022-12-14 12:59:50,601 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 24 treesize of output 23 [2022-12-14 12:59:50,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:50,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 12:59:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:50,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-12-14 12:59:50,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:50,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-12-14 12:59:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:50,735 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2022-12-14 12:59:50,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:50,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-12-14 12:59:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:59:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:59:50,837 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-12-14 12:59:50,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-12-14 12:59:50,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 40 [2022-12-14 12:59:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:59:50,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:03,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821453304] [2022-12-14 13:00:03,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:00:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216877718] [2022-12-14 13:00:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216877718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875275446] [2022-12-14 13:00:03,301 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:03,301 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:03,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:03,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:03,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,367 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 13:00:03,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-12-14 13:00:03,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,394 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:00:03,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:00:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,472 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:00:03,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:00:03,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 13:00:03,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:03,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:03,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:03,622 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 13:00:03,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 13:00:03,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:00:03,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:03,768 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:00:03,768 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 26 treesize of output 34 [2022-12-14 13:00:03,818 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:00:03,818 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 26 treesize of output 54 [2022-12-14 13:00:03,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:03,868 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:00:03,868 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 21 treesize of output 29 [2022-12-14 13:00:03,917 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:00:03,917 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 13:00:03,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:03,950 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:00:03,951 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 26 treesize of output 34 [2022-12-14 13:00:03,999 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:00:03,999 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 26 treesize of output 54 [2022-12-14 13:00:04,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:05,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '815#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:00:05,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:05,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:00:05,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-12-14 13:00:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325485957] [2022-12-14 13:00:05,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 13:00:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 13:00:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=900, Unknown=1, NotChecked=0, Total=992 [2022-12-14 13:00:05,059 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:12,611 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-12-14 13:00:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:00:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:00:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:12,612 INFO L225 Difference]: With dead ends: 36 [2022-12-14 13:00:12,612 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 13:00:12,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=122, Invalid=1209, Unknown=1, NotChecked=0, Total=1332 [2022-12-14 13:00:12,613 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:12,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:00:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 13:00:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-12-14 13:00:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-12-14 13:00:12,622 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-12-14 13:00:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:12,622 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-12-14 13:00:12,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-12-14 13:00:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:00:12,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:12,623 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:12,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:00:12,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:12,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2119813775, now seen corresponding path program 5 times [2022-12-14 13:00:12,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:12,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587580344] [2022-12-14 13:00:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:12,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:00:12,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348321862] [2022-12-14 13:00:12,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:12,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:12,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:12,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:12,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:00:12,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:00:12,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:00:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:12,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:12,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:12,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587580344] [2022-12-14 13:00:12,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:00:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348321862] [2022-12-14 13:00:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348321862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570097200] [2022-12-14 13:00:12,997 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:12,997 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:12,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:12,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:12,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:13,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,064 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 13:00:13,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-12-14 13:00:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,088 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:00:13,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:00:13,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,164 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:00:13,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:00:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 13:00:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:13,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:13,318 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 13:00:13,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 13:00:13,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:00:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:13,448 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:00:13,448 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 26 treesize of output 34 [2022-12-14 13:00:13,504 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:00:13,504 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 26 treesize of output 54 [2022-12-14 13:00:13,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:13,549 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:00:13,549 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 31 treesize of output 34 [2022-12-14 13:00:13,604 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:00:13,604 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 31 treesize of output 54 [2022-12-14 13:00:13,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:13,652 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:00:13,652 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 26 treesize of output 34 [2022-12-14 13:00:13,707 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:00:13,707 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 26 treesize of output 54 [2022-12-14 13:00:13,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:14,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1045#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:00:14,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:14,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:00:14,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 13:00:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673156867] [2022-12-14 13:00:14,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:00:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:00:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:00:14,120 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:14,215 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-12-14 13:00:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:00:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 13:00:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:14,216 INFO L225 Difference]: With dead ends: 41 [2022-12-14 13:00:14,216 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 13:00:14,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:00:14,217 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:14,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 13:00:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-12-14 13:00:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-12-14 13:00:14,223 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-12-14 13:00:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:14,223 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-12-14 13:00:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-12-14 13:00:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:00:14,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:14,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:14,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:00:14,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:14,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1666458246, now seen corresponding path program 6 times [2022-12-14 13:00:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813085574] [2022-12-14 13:00:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:14,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:00:14,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371866226] [2022-12-14 13:00:14,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:00:14,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:14,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:14,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:14,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:00:14,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:00:14,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:00:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:14,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813085574] [2022-12-14 13:00:14,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:00:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371866226] [2022-12-14 13:00:14,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371866226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:14,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763302476] [2022-12-14 13:00:14,599 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:00:14,599 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:14,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:14,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:14,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,624 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:00:14,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:00:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,684 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 13:00:14,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-12-14 13:00:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,745 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:00:14,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:00:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 13:00:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:14,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,879 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 13:00:14,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 13:00:14,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:00:14,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:14,979 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:00:14,979 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 21 treesize of output 29 [2022-12-14 13:00:15,027 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:00:15,028 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 26 treesize of output 54 [2022-12-14 13:00:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:15,079 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:00:15,079 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 21 treesize of output 29 [2022-12-14 13:00:15,127 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:00:15,127 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 31 treesize of output 54 [2022-12-14 13:00:15,153 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:00:15,153 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 21 treesize of output 29 [2022-12-14 13:00:15,200 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:00:15,201 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 26 treesize of output 54 [2022-12-14 13:00:15,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:15,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1290#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:00:15,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:15,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:00:15,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 13:00:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170974093] [2022-12-14 13:00:15,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:00:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:00:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:00:15,444 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:15,519 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-12-14 13:00:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:00:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 13:00:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:15,520 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:00:15,520 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 13:00:15,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:00:15,521 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:15,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 13:00:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 13:00:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 13:00:15,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-12-14 13:00:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:15,527 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 13:00:15,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:00:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 13:00:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:00:15,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:15,527 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:15,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:00:15,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:15,729 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash -72472683, now seen corresponding path program 7 times [2022-12-14 13:00:15,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:15,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856401834] [2022-12-14 13:00:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:15,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:00:15,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527333884] [2022-12-14 13:00:15,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:00:15,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:15,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:15,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:15,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:00:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:15,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 93 conjunts are in the unsatisfiable core [2022-12-14 13:00:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:00:15,863 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 [2022-12-14 13:00:15,877 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 24 treesize of output 23 [2022-12-14 13:00:15,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 13:00:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:15,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 13:00:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:15,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-12-14 13:00:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:16,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2022-12-14 13:00:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,073 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 0 case distinctions, treesize of input 76 treesize of output 51 [2022-12-14 13:00:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,146 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 0 case distinctions, treesize of input 60 treesize of output 49 [2022-12-14 13:00:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,185 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 0 case distinctions, treesize of input 66 treesize of output 51 [2022-12-14 13:00:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,238 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 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 13:00:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2022-12-14 13:00:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:16,384 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 0 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 13:00:16,442 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 0 case distinctions, treesize of input 50 treesize of output 43 [2022-12-14 13:00:16,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2022-12-14 13:00:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:16,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:39,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:39,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856401834] [2022-12-14 13:01:39,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:01:39,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527333884] [2022-12-14 13:01:39,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527333884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:39,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241972644] [2022-12-14 13:01:39,930 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:01:39,930 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:39,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:39,930 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:39,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:39,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:39,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,000 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 13:01:40,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-12-14 13:01:40,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,062 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:01:40,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:01:40,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 13:01:40,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 13:01:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:40,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:40,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:40,223 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 13:01:40,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 13:01:40,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:01:40,319 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:01:40,319 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 21 treesize of output 29 [2022-12-14 13:01:40,367 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:01:40,367 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 26 treesize of output 54 [2022-12-14 13:01:40,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:40,412 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:01:40,412 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 21 treesize of output 29 [2022-12-14 13:01:40,461 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:01:40,461 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 31 treesize of output 54 [2022-12-14 13:01:40,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:40,493 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:01:40,493 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 26 treesize of output 34 [2022-12-14 13:01:40,541 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:01:40,541 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 26 treesize of output 54 [2022-12-14 13:01:40,559 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:43,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1563#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:01:43,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:43,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:01:43,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-12-14 13:01:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317529862] [2022-12-14 13:01:43,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 13:01:43,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 13:01:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1427, Unknown=17, NotChecked=0, Total=1560 [2022-12-14 13:01:43,182 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:09,406 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-12-14 13:02:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:02:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 13:02:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:09,407 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:02:09,407 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 13:02:09,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=157, Invalid=1896, Unknown=17, NotChecked=0, Total=2070 [2022-12-14 13:02:09,409 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:09,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-12-14 13:02:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 13:02:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-12-14 13:02:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 13:02:09,419 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-12-14 13:02:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:09,419 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 13:02:09,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 13:02:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:02:09,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:09,419 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:09,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:02:09,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 13:02:09,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:09,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1317708229, now seen corresponding path program 8 times [2022-12-14 13:02:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:09,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931151250] [2022-12-14 13:02:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:09,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:02:09,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903123725] [2022-12-14 13:02:09,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:02:09,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:09,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:09,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:02:09,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:02:09,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:02:09,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:02:09,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:02:09,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931151250] [2022-12-14 13:02:09,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:02:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903123725] [2022-12-14 13:02:09,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903123725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351488049] [2022-12-14 13:02:09,879 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:09,879 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:09,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:09,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:09,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:09,906 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:02:09,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:02:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:09,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:09,978 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:02:09,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:02:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:09,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 13:02:10,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 13:02:10,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:10,119 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 13:02:10,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 13:02:10,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:02:10,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:10,223 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:02:10,223 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 21 treesize of output 29 [2022-12-14 13:02:10,279 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:02:10,279 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 26 treesize of output 54 [2022-12-14 13:02:10,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:10,322 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:02:10,322 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 31 treesize of output 34 [2022-12-14 13:02:10,373 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:02:10,373 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 31 treesize of output 54 [2022-12-14 13:02:10,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:10,428 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:02:10,428 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 26 treesize of output 34 [2022-12-14 13:02:10,478 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:02:10,479 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 26 treesize of output 54 [2022-12-14 13:02:10,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:10,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1852#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:02:10,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:10,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:02:10,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 13:02:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140288993] [2022-12-14 13:02:10,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:10,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:02:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:02:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:02:10,761 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:10,931 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-12-14 13:02:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:02:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:02:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:10,931 INFO L225 Difference]: With dead ends: 51 [2022-12-14 13:02:10,931 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:02:10,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:02:10,932 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:10,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:02:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-12-14 13:02:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 13:02:10,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-12-14 13:02:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:10,942 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 13:02:10,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 13:02:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:02:10,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:10,943 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:10,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:11,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:11,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2048008538, now seen corresponding path program 9 times [2022-12-14 13:02:11,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:11,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819812559] [2022-12-14 13:02:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:11,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:11,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:02:11,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677612270] [2022-12-14 13:02:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:02:11,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:11,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:11,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:11,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:02:11,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:02:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:11,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:02:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:02:11,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:02:11,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819812559] [2022-12-14 13:02:11,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:02:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677612270] [2022-12-14 13:02:11,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677612270] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009820419] [2022-12-14 13:02:11,379 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:02:11,379 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:11,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:11,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:11,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,405 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:02:11,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:02:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,463 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 13:02:11,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-12-14 13:02:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,529 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:02:11,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:02:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 13:02:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,666 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 13:02:11,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 13:02:11,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:02:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,770 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:02:11,770 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 26 treesize of output 34 [2022-12-14 13:02:11,825 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:02:11,825 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 26 treesize of output 54 [2022-12-14 13:02:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,865 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:02:11,866 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 31 treesize of output 34 [2022-12-14 13:02:11,914 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:02:11,914 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 31 treesize of output 54 [2022-12-14 13:02:11,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,957 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:02:11,958 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 21 treesize of output 29 [2022-12-14 13:02:12,002 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:02:12,002 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 26 treesize of output 54 [2022-12-14 13:02:12,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:12,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2158#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:02:12,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:12,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:02:12,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 13:02:12,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847367372] [2022-12-14 13:02:12,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:12,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:02:12,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:12,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:02:12,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:02:12,279 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:12,394 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-12-14 13:02:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:02:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:02:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:12,395 INFO L225 Difference]: With dead ends: 51 [2022-12-14 13:02:12,395 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 13:02:12,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-12-14 13:02:12,395 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:12,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:12,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 13:02:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 13:02:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-14 13:02:12,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-12-14 13:02:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:12,403 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-14 13:02:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:02:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-14 13:02:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:02:12,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:12,403 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:12,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:02:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:12,605 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash 992060457, now seen corresponding path program 10 times [2022-12-14 13:02:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:12,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734515054] [2022-12-14 13:02:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:12,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:02:12,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012407883] [2022-12-14 13:02:12,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:02:12,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:12,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:12,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:12,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:02:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:12,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-14 13:02:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:12,748 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 [2022-12-14 13:02:12,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:02:12,767 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 24 treesize of output 23 [2022-12-14 13:02:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 13:02:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-12-14 13:02:12,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-12-14 13:02:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-12-14 13:02:12,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:12,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 13:02:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,033 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 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-12-14 13:02:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-12-14 13:02:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,185 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 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 69 [2022-12-14 13:02:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-12-14 13:02:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,313 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 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 66 [2022-12-14 13:02:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 63 [2022-12-14 13:02:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,529 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 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 70 [2022-12-14 13:02:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:13,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,616 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 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 75 [2022-12-14 13:02:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:13,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 74 [2022-12-14 13:02:13,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 64 [2022-12-14 13:02:13,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 51 [2022-12-14 13:02:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:13,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:05:29,324 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) ~N~0) (= (let ((.cse21 (let ((.cse22 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse22 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse22 16 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset| 24) 1)))) (let ((.cse19 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21))) (let ((.cse20 (select .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse13 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (select (select (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13)) (.cse12 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse5 (select (select (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse4 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse14 (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse4 .cse5 .cse6))))) (let ((.cse16 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse15 (let ((.cse17 (let ((.cse18 (store .cse16 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse0 .cse1 .cse2 .cse4 .cse5 .cse6)))) (store .cse18 .cse13 (+ (select (select (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse16 .cse13)))))) (store .cse17 .cse12 (+ (select (select (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| .cse17) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse16 .cse12)))))) (store .cse15 .cse11 (+ (select (select (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| .cse15) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse16 .cse11))))))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse4 .cse5 .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse8 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12))) (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))))))))))))))))) (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (not (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0)))) is different from false [2022-12-14 13:05:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-12-14 13:05:29,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734515054] [2022-12-14 13:05:29,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:05:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012407883] [2022-12-14 13:05:29,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012407883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:05:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257739242] [2022-12-14 13:05:29,388 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:05:29,388 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:05:29,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:05:29,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:05:29,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:05:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,417 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:05:29,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:05:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,488 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:05:29,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:05:29,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 13:05:29,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 13:05:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:05:29,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:29,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:29,635 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 13:05:29,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 13:05:29,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:05:29,760 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:05:29,760 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 21 treesize of output 29 [2022-12-14 13:05:29,814 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:05:29,814 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 26 treesize of output 54 [2022-12-14 13:05:29,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:29,865 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:05:29,865 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 21 treesize of output 29 [2022-12-14 13:05:29,920 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:05:29,921 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 31 treesize of output 54 [2022-12-14 13:05:29,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:05:29,956 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:05:29,956 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 26 treesize of output 34 [2022-12-14 13:05:30,005 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:05:30,005 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 26 treesize of output 54 [2022-12-14 13:05:30,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:37,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2491#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:05:37,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:05:37,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:05:37,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-12-14 13:05:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730263446] [2022-12-14 13:05:37,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:05:37,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 13:05:37,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 13:05:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1994, Unknown=32, NotChecked=90, Total=2256 [2022-12-14 13:05:37,226 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:06:29,216 WARN L233 SmtUtils]: Spent 33.48s on a formula simplification. DAG size of input: 173 DAG size of output: 172 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:33,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 13:07:09,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 13:07:11,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 13:07:13,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 13:07:15,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 13:07:18,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 13:08:26,048 WARN L233 SmtUtils]: Spent 11.39s on a formula simplification. DAG size of input: 181 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:09:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:32,647 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-12-14 13:09:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 13:09:32,648 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 13:09:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:32,648 INFO L225 Difference]: With dead ends: 54 [2022-12-14 13:09:32,648 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:09:32,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 382.2s TimeCoverageRelationStatistics Valid=192, Invalid=2620, Unknown=54, NotChecked=104, Total=2970 [2022-12-14 13:09:32,649 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:32,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 741 Invalid, 2 Unknown, 28 Unchecked, 46.2s Time] [2022-12-14 13:09:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:09:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-12-14 13:09:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-14 13:09:32,664 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-12-14 13:09:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:32,664 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-14 13:09:32,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-14 13:09:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:09:32,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:32,665 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:32,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 13:09:32,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:32,866 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1216276529, now seen corresponding path program 11 times [2022-12-14 13:09:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285525111] [2022-12-14 13:09:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:32,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:09:32,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240634703] [2022-12-14 13:09:32,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:09:32,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:32,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:32,897 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:32,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:09:33,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:09:33,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:09:33,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:09:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:09:33,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:09:33,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:33,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285525111] [2022-12-14 13:09:33,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:09:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240634703] [2022-12-14 13:09:33,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240634703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725831601] [2022-12-14 13:09:33,365 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:09:33,365 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:33,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:33,365 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:33,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,435 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:09:33,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:09:33,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 13:09:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 13:09:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 13:09:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:33,598 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 13:09:33,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 13:09:33,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:09:33,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:33,716 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:09:33,716 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 26 treesize of output 34 [2022-12-14 13:09:33,770 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:09:33,770 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 26 treesize of output 54 [2022-12-14 13:09:33,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:33,822 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:09:33,822 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 21 treesize of output 29 [2022-12-14 13:09:33,869 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:09:33,869 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 31 treesize of output 54 [2022-12-14 13:09:33,896 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:09:33,896 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 21 treesize of output 29 [2022-12-14 13:09:33,939 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:09:33,939 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 26 treesize of output 54 [2022-12-14 13:09:33,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:34,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2839#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:09:34,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:34,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:09:34,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 13:09:34,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098434934] [2022-12-14 13:09:34,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:34,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:09:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:09:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:09:34,212 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:34,444 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-12-14 13:09:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:09:34,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 13:09:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:34,445 INFO L225 Difference]: With dead ends: 61 [2022-12-14 13:09:34,445 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 13:09:34,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:09:34,446 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:34,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:09:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 13:09:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-12-14 13:09:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-12-14 13:09:34,464 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2022-12-14 13:09:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:34,464 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-12-14 13:09:34,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-12-14 13:09:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:09:34,464 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:34,464 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:34,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:09:34,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:34,666 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 688797510, now seen corresponding path program 12 times [2022-12-14 13:09:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:34,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34775803] [2022-12-14 13:09:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:34,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:09:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247558987] [2022-12-14 13:09:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:09:34,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:34,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:34,726 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:34,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:09:34,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:09:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:09:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:09:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:09:34,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:09:34,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34775803] [2022-12-14 13:09:34,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:09:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247558987] [2022-12-14 13:09:34,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247558987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639344247] [2022-12-14 13:09:34,960 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:09:34,960 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:34,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:34,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:34,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,036 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:09:35,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:09:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 13:09:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 13:09:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 13:09:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:35,208 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 13:09:35,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 13:09:35,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:09:35,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:35,350 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:09:35,351 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 26 treesize of output 34 [2022-12-14 13:09:35,400 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:09:35,400 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 26 treesize of output 54 [2022-12-14 13:09:35,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:35,458 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:09:35,458 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 31 treesize of output 34 [2022-12-14 13:09:35,519 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:09:35,519 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 31 treesize of output 54 [2022-12-14 13:09:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:35,569 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:09:35,569 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 26 treesize of output 34 [2022-12-14 13:09:35,631 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:09:35,631 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 26 treesize of output 54 [2022-12-14 13:09:35,649 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:36,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3206#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 13:09:36,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:36,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:09:36,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 13:09:36,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798284897] [2022-12-14 13:09:36,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:36,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:09:36,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:09:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:09:36,347 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:36,516 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-14 13:09:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:09:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 13:09:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:36,517 INFO L225 Difference]: With dead ends: 60 [2022-12-14 13:09:36,517 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 13:09:36,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:09:36,518 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:36,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:09:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 13:09:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 13:09:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-14 13:09:36,532 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-12-14 13:09:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:36,532 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-14 13:09:36,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-14 13:09:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:09:36,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:36,533 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:36,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:09:36,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:09:36,733 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1689346091, now seen corresponding path program 13 times [2022-12-14 13:09:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:36,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986015919] [2022-12-14 13:09:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:36,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:36,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:09:36,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184777005] [2022-12-14 13:09:36,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:09:36,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:36,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:36,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50d1fd31-3bd5-4ed9-836f-acbdaa12e882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:09:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:36,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 139 conjunts are in the unsatisfiable core [2022-12-14 13:09:36,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:36,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:09:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,893 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 19 treesize of output 18 [2022-12-14 13:09:36,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 13:09:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-12-14 13:09:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:36,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-12-14 13:09:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 55 treesize of output 66 [2022-12-14 13:09:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:37,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 13:09:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:37,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 79 [2022-12-14 13:09:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-12-14 13:09:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-12-14 13:09:37,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-12-14 13:09:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 76 [2022-12-14 13:09:37,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-12-14 13:09:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-12-14 13:09:37,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-12-14 13:09:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:37,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-12-14 13:09:38,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 13:09:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-12-14 13:09:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-12-14 13:09:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-12-14 13:09:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 66 [2022-12-14 13:09:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:38,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 50 [2022-12-14 13:09:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:09:38,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:05,957 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (let ((.cse25 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse25))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse12 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse16 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16)) (.cse15 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse6 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15)) (.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse11 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse5 .cse6 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)) (.cse13 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse5 .cse6 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse17 (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse5 .cse6 .cse8 .cse11 .cse12))))) (let ((.cse19 (select .cse17 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse18 (let ((.cse20 (let ((.cse21 (let ((.cse22 (store .cse19 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse0 .cse1 .cse5 .cse6 .cse8 .cse11 .cse12)))) (store .cse22 .cse16 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse16)))))) (store .cse21 .cse15 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse15)))))) (store .cse20 .cse14 (+ (select .cse19 .cse14) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse18 .cse13 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse13))))))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse9 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse5 .cse6 .cse7 .cse8 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16))) (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse5 .cse6 .cse7 .cse8 .cse9 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse10 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse5 .cse6 .cse7 .cse8 .cse9 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (+ .cse0 .cse1 .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))))))))))))))))))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2022-12-14 13:12:08,945 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (let ((.cse25 (let ((.cse26 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse26 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse25))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse3 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse16 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16)) (.cse15 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15)) (.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse9 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)) (.cse13 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse11 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse17 (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse8 .cse9 .cse11))))) (let ((.cse19 (select .cse17 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse10 (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse18 (let ((.cse20 (let ((.cse21 (let ((.cse22 (store .cse19 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse2 .cse3 .cse4 .cse8 .cse9 .cse10 .cse11)))) (store .cse22 .cse16 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse16)))))) (store .cse21 .cse15 (+ (select .cse19 .cse15) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse20 .cse14 (+ (select .cse19 .cse14) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse18 .cse13 (+ (select .cse19 .cse13) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse12 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16))) (let ((.cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2 .cse3 .cse4 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (+ .cse0 .cse1 .cse2 .cse3 .cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12)))))))))))))))))) (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)))) is different from false [2022-12-14 13:14:59,369 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) ~N~0)) (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (let ((.cse25 (let ((.cse26 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse26 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse26 16 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| 24) 1) (+ .cse26 32 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse25))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse11 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse12 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse16 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16)) (.cse15 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15)) (.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse8 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse5 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)) (.cse13 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse5 .cse8 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse17 (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse5 .cse8 .cse11 .cse12))))) (let ((.cse19 (select .cse17 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse7 (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse18 (let ((.cse20 (let ((.cse21 (let ((.cse22 (store .cse19 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse2 .cse4 .cse5 .cse7 .cse8 .cse11 .cse12)))) (store .cse22 .cse16 (+ (select .cse19 .cse16) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse21 .cse15 (+ (select .cse19 .cse15) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse20 .cse14 (+ (select .cse19 .cse14) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse18 .cse13 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse13))))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse10 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse5 .cse6 .cse7 .cse8 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16))) (let ((.cse9 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse5 .cse6 .cse7 .cse8 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse3 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))))))))))))))))))) (< (+ 5 |c_ULTIMATE.start_main_~i~0#1|) ~N~0))) is different from false [2022-12-14 13:15:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-12-14 13:15:00,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:15:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986015919] [2022-12-14 13:15:00,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:15:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184777005] [2022-12-14 13:15:00,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184777005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:15:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [460556862] [2022-12-14 13:15:00,171 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:15:00,171 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:15:00,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:15:00,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:15:00,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:15:00,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,211 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:15:00,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 13:15:00,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,283 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 13:15:00,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 13:15:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 13:15:00,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 13:15:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:00,450 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 13:15:00,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 13:15:00,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:15:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:00,556 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:15:00,556 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 26 treesize of output 34 [2022-12-14 13:15:00,616 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:15:00,617 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 26 treesize of output 54 [2022-12-14 13:15:00,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:00,667 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 13:15:00,667 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 21 treesize of output 29 [2022-12-14 13:15:00,724 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 13:15:00,725 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 31 treesize of output 54 [2022-12-14 13:15:00,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:00,767 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 13:15:00,767 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 26 treesize of output 34 [2022-12-14 13:15:00,826 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 13:15:00,827 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 26 treesize of output 54 [2022-12-14 13:15:00,848 INFO L180 IcfgInterpreter]: Interpretation finished