./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs --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 ee51a3e0b13e63fefbde67983fa99503ca983785 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs --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 ee51a3e0b13e63fefbde67983fa99503ca983785 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:19:43,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:19:43,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:19:43,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:19:43,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:19:43,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:19:43,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:19:43,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:19:43,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:19:43,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:19:43,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:19:43,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:19:43,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:19:43,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:19:43,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:19:43,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:19:43,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:19:43,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:19:43,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:19:43,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:19:43,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:19:43,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:19:43,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:19:43,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:19:43,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:19:43,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:19:43,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:19:43,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:19:43,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:19:43,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:19:43,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:19:43,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:19:43,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:19:43,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:19:43,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:19:43,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:19:43,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:19:43,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:19:43,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:19:43,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:19:43,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:19:43,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:19:43,274 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:19:43,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:19:43,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:19:43,275 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:19:43,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:19:43,276 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:19:43,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:19:43,276 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:19:43,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:19:43,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:19:43,277 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:19:43,277 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:19:43,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:19:43,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:19:43,277 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:19:43,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:19:43,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:19:43,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:19:43,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:19:43,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:19:43,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:19:43,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:19:43,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:19:43,279 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:19:43,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:19:43,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:19:43,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:19:43,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:19:43,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:19:43,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:19:43,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:19:43,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:19:43,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:19:43,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:19:43,281 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:19:43,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:19:43,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:19:43,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:19:43,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:19:43,282 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee51a3e0b13e63fefbde67983fa99503ca983785 [2021-10-16 02:19:43,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:19:43,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:19:43,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:19:43,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:19:43,564 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:19:43,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-16 02:19:43,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/e0ede8d1e/340f4f82d3cd414192568e7997e0d809/FLAGf73c554a5 [2021-10-16 02:19:44,067 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:19:44,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-16 02:19:44,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/e0ede8d1e/340f4f82d3cd414192568e7997e0d809/FLAGf73c554a5 [2021-10-16 02:19:44,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/e0ede8d1e/340f4f82d3cd414192568e7997e0d809 [2021-10-16 02:19:44,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:19:44,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:19:44,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:19:44,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:19:44,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:19:44,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:44" (1/1) ... [2021-10-16 02:19:44,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf9b0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:44, skipping insertion in model container [2021-10-16 02:19:44,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:44" (1/1) ... [2021-10-16 02:19:44,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:19:44,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:19:44,691 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-16 02:19:44,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:19:44,709 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-16 02:19:44,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5411f5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:44, skipping insertion in model container [2021-10-16 02:19:44,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:19:44,710 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-16 02:19:44,712 INFO L168 Benchmark]: Toolchain (without parser) took 252.26 ms. Allocated memory is still 121.6 MB. Free memory was 85.1 MB in the beginning and 97.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:44,713 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 121.6 MB. Free memory was 95.3 MB in the beginning and 95.3 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:19:44,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.12 ms. Allocated memory is still 121.6 MB. Free memory was 84.9 MB in the beginning and 97.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:44,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 121.6 MB. Free memory was 95.3 MB in the beginning and 95.3 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.12 ms. Allocated memory is still 121.6 MB. Free memory was 84.9 MB in the beginning and 97.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 99]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:19:46,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:19:46,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:19:46,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:19:46,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:19:46,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:19:46,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:19:46,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:19:46,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:19:46,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:19:46,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:19:46,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:19:46,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:19:46,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:19:46,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:19:46,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:19:46,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:19:46,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:19:46,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:19:47,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:19:47,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:19:47,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:19:47,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:19:47,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:19:47,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:19:47,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:19:47,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:19:47,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:19:47,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:19:47,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:19:47,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:19:47,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:19:47,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:19:47,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:19:47,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:19:47,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:19:47,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:19:47,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:19:47,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:19:47,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:19:47,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:19:47,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:19:47,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:19:47,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:19:47,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:19:47,080 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:19:47,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:19:47,080 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:19:47,080 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:19:47,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:19:47,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:19:47,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:19:47,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:19:47,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:19:47,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:19:47,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:19:47,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:19:47,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:19:47,082 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:19:47,083 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:19:47,083 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:19:47,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:19:47,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:19:47,083 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:19:47,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:19:47,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:19:47,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:19:47,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:19:47,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:19:47,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:19:47,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:19:47,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:19:47,085 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:19:47,085 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:19:47,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:19:47,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:19:47,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:19:47,086 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee51a3e0b13e63fefbde67983fa99503ca983785 [2021-10-16 02:19:47,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:19:47,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:19:47,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:19:47,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:19:47,524 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:19:47,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-16 02:19:47,595 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/0a0024b70/897fd15ad71f4ceebfac14cba7727464/FLAG943944103 [2021-10-16 02:19:48,061 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:19:48,062 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-16 02:19:48,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/0a0024b70/897fd15ad71f4ceebfac14cba7727464/FLAG943944103 [2021-10-16 02:19:48,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/data/0a0024b70/897fd15ad71f4ceebfac14cba7727464 [2021-10-16 02:19:48,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:19:48,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:19:48,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:19:48,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:19:48,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:19:48,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79c28248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48, skipping insertion in model container [2021-10-16 02:19:48,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:19:48,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:19:48,670 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-16 02:19:48,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:19:48,706 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-16 02:19:48,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:19:48,736 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-16 02:19:48,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:19:48,765 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:19:48,819 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2021-10-16 02:19:48,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:19:48,845 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:19:48,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48 WrapperNode [2021-10-16 02:19:48,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:19:48,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:19:48,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:19:48,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:19:48,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:19:48,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:19:48,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:19:48,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:19:48,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:19:48,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:19:48,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:19:48,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:19:48,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (1/1) ... [2021-10-16 02:19:48,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:19:48,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:19:48,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:19:48,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:19:49,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:19:49,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:19:49,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:19:49,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-16 02:19:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-16 02:19:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-16 02:19:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-16 02:19:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-16 02:19:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-16 02:19:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:19:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:19:49,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:19:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:19:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:19:49,017 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 02:19:49,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:19:49,542 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-16 02:19:49,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:49 BoogieIcfgContainer [2021-10-16 02:19:49,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:19:49,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:19:49,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:19:49,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:19:49,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:19:48" (1/3) ... [2021-10-16 02:19:49,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f298d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:49, skipping insertion in model container [2021-10-16 02:19:49,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:48" (2/3) ... [2021-10-16 02:19:49,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f298d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:49, skipping insertion in model container [2021-10-16 02:19:49,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:49" (3/3) ... [2021-10-16 02:19:49,558 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2021-10-16 02:19:49,563 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 02:19:49,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:19:49,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:19:49,563 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 02:19:49,594 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,594 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,595 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,595 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,595 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,595 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,595 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,596 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,597 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,598 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,598 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,599 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,599 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,599 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,599 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,599 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,599 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,600 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,600 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,600 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,600 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,601 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,601 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,602 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,602 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,603 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,605 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,606 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,606 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,607 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,608 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,609 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,609 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,609 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,609 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,609 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,609 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,610 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,610 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,613 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,613 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,613 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,618 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,618 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,619 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,619 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,619 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,621 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,621 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:19:49,628 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-16 02:19:49,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:19:49,677 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:19:49,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-16 02:19:49,693 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 02:19:49,706 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 143 transitions, 310 flow [2021-10-16 02:19:49,712 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 143 transitions, 310 flow [2021-10-16 02:19:49,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 143 transitions, 310 flow [2021-10-16 02:19:49,824 INFO L129 PetriNetUnfolder]: 12/140 cut-off events. [2021-10-16 02:19:49,824 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-16 02:19:49,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 140 events. 12/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2021-10-16 02:19:49,835 INFO L116 LiptonReduction]: Number of co-enabled transitions 1728 [2021-10-16 02:20:02,937 INFO L131 LiptonReduction]: Checked pairs total: 1798 [2021-10-16 02:20:02,937 INFO L133 LiptonReduction]: Total number of compositions: 132 [2021-10-16 02:20:02,960 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-10-16 02:20:02,982 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:20:02,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:02,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:02,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1951902287, now seen corresponding path program 1 times [2021-10-16 02:20:03,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:03,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123341598] [2021-10-16 02:20:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:03,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:03,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:03,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:20:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:20:03,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:03,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:03,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:03,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123341598] [2021-10-16 02:20:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123341598] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:03,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-16 02:20:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869091468] [2021-10-16 02:20:03,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:20:03,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:20:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:20:03,813 INFO L87 Difference]: Start difference. First operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 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 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:03,867 INFO L93 Difference]: Finished difference Result 204 states and 632 transitions. [2021-10-16 02:20:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:20:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-16 02:20:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:03,882 INFO L225 Difference]: With dead ends: 204 [2021-10-16 02:20:03,882 INFO L226 Difference]: Without dead ends: 197 [2021-10-16 02:20:03,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:20:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-16 02:20:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-10-16 02:20:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 3.13265306122449) internal successors, (614), 196 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 614 transitions. [2021-10-16 02:20:03,947 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 614 transitions. Word has length 20 [2021-10-16 02:20:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:03,948 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 614 transitions. [2021-10-16 02:20:03,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 614 transitions. [2021-10-16 02:20:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:03,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:03,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:03,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:20:04,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:04,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1880834181, now seen corresponding path program 1 times [2021-10-16 02:20:04,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:04,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79679411] [2021-10-16 02:20:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:04,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:04,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:04,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:20:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:04,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:04,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:04,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:04,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79679411] [2021-10-16 02:20:04,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79679411] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:04,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:20:04,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-16 02:20:04,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293869520] [2021-10-16 02:20:04,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:20:04,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:20:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:04,809 INFO L87 Difference]: Start difference. First operand 197 states and 614 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:05,045 INFO L93 Difference]: Finished difference Result 259 states and 814 transitions. [2021-10-16 02:20:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:20:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-16 02:20:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:05,051 INFO L225 Difference]: With dead ends: 259 [2021-10-16 02:20:05,051 INFO L226 Difference]: Without dead ends: 259 [2021-10-16 02:20:05,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:20:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-16 02:20:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 213. [2021-10-16 02:20:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.19811320754717) internal successors, (678), 212 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 678 transitions. [2021-10-16 02:20:05,083 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 678 transitions. Word has length 21 [2021-10-16 02:20:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:05,084 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 678 transitions. [2021-10-16 02:20:05,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 678 transitions. [2021-10-16 02:20:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:05,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:05,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:05,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:05,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:05,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 235636759, now seen corresponding path program 1 times [2021-10-16 02:20:05,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:05,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470389422] [2021-10-16 02:20:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:05,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:05,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:05,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:05,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:20:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:05,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:05,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:05,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470389422] [2021-10-16 02:20:05,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470389422] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:05,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:20:05,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-16 02:20:05,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032495126] [2021-10-16 02:20:05,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:20:05,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:20:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:05,927 INFO L87 Difference]: Start difference. First operand 213 states and 678 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:06,166 INFO L93 Difference]: Finished difference Result 305 states and 974 transitions. [2021-10-16 02:20:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:20:06,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-16 02:20:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:06,175 INFO L225 Difference]: With dead ends: 305 [2021-10-16 02:20:06,175 INFO L226 Difference]: Without dead ends: 305 [2021-10-16 02:20:06,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:20:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-16 02:20:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 213. [2021-10-16 02:20:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.188679245283019) internal successors, (676), 212 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 676 transitions. [2021-10-16 02:20:06,207 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 676 transitions. Word has length 21 [2021-10-16 02:20:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:06,208 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 676 transitions. [2021-10-16 02:20:06,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 676 transitions. [2021-10-16 02:20:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:06,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:06,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:06,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:06,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:06,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 923197355, now seen corresponding path program 1 times [2021-10-16 02:20:06,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:06,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467824102] [2021-10-16 02:20:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:06,439 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:06,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:06,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:20:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:06,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:06,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:06,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467824102] [2021-10-16 02:20:06,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467824102] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:06,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:20:06,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-16 02:20:07,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122749658] [2021-10-16 02:20:07,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:20:07,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:20:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:20:07,001 INFO L87 Difference]: Start difference. First operand 213 states and 676 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:07,135 INFO L93 Difference]: Finished difference Result 411 states and 1247 transitions. [2021-10-16 02:20:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:20:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-16 02:20:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:07,140 INFO L225 Difference]: With dead ends: 411 [2021-10-16 02:20:07,140 INFO L226 Difference]: Without dead ends: 371 [2021-10-16 02:20:07,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-10-16 02:20:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 283. [2021-10-16 02:20:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.152482269503546) internal successors, (889), 282 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 889 transitions. [2021-10-16 02:20:07,182 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 889 transitions. Word has length 21 [2021-10-16 02:20:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:07,183 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 889 transitions. [2021-10-16 02:20:07,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 889 transitions. [2021-10-16 02:20:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:07,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:07,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:07,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:07,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:07,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1077666571, now seen corresponding path program 2 times [2021-10-16 02:20:07,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:07,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647710092] [2021-10-16 02:20:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:20:07,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:07,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:07,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:07,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:20:07,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:07,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:07,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:07,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:08,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:08,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647710092] [2021-10-16 02:20:08,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647710092] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:08,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:08,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:20:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660063969] [2021-10-16 02:20:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:20:08,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:20:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:08,111 INFO L87 Difference]: Start difference. First operand 283 states and 889 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:08,509 INFO L93 Difference]: Finished difference Result 495 states and 1571 transitions. [2021-10-16 02:20:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:20:08,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:08,518 INFO L225 Difference]: With dead ends: 495 [2021-10-16 02:20:08,518 INFO L226 Difference]: Without dead ends: 491 [2021-10-16 02:20:08,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:20:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-16 02:20:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 339. [2021-10-16 02:20:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.260355029585799) internal successors, (1102), 338 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1102 transitions. [2021-10-16 02:20:08,538 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1102 transitions. Word has length 21 [2021-10-16 02:20:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:08,539 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1102 transitions. [2021-10-16 02:20:08,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1102 transitions. [2021-10-16 02:20:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:08,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:08,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:08,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:08,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:08,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:08,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2099040221, now seen corresponding path program 3 times [2021-10-16 02:20:08,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:08,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761373187] [2021-10-16 02:20:08,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:20:08,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:08,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:08,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:20:08,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:20:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:09,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:09,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:09,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761373187] [2021-10-16 02:20:09,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761373187] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:09,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:09,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:20:09,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218520848] [2021-10-16 02:20:09,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:20:09,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:20:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:09,420 INFO L87 Difference]: Start difference. First operand 339 states and 1102 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:09,856 INFO L93 Difference]: Finished difference Result 577 states and 1747 transitions. [2021-10-16 02:20:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:20:09,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:09,863 INFO L225 Difference]: With dead ends: 577 [2021-10-16 02:20:09,863 INFO L226 Difference]: Without dead ends: 557 [2021-10-16 02:20:09,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:20:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-10-16 02:20:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 317. [2021-10-16 02:20:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.2056962025316458) internal successors, (1013), 316 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 1013 transitions. [2021-10-16 02:20:09,882 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 1013 transitions. Word has length 21 [2021-10-16 02:20:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:09,883 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 1013 transitions. [2021-10-16 02:20:09,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 1013 transitions. [2021-10-16 02:20:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:09,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:09,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:09,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:10,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:10,097 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1823547957, now seen corresponding path program 4 times [2021-10-16 02:20:10,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:10,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087388693] [2021-10-16 02:20:10,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:10,099 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:10,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:10,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:10,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:20:10,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:10,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:10,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:10,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:10,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087388693] [2021-10-16 02:20:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087388693] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:10,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:10,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:20:10,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548554213] [2021-10-16 02:20:10,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:20:10,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:20:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:10,759 INFO L87 Difference]: Start difference. First operand 317 states and 1013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:11,177 INFO L93 Difference]: Finished difference Result 431 states and 1314 transitions. [2021-10-16 02:20:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:20:11,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:11,182 INFO L225 Difference]: With dead ends: 431 [2021-10-16 02:20:11,183 INFO L226 Difference]: Without dead ends: 423 [2021-10-16 02:20:11,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:20:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-16 02:20:11,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 325. [2021-10-16 02:20:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.2037037037037037) internal successors, (1038), 324 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1038 transitions. [2021-10-16 02:20:11,204 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1038 transitions. Word has length 21 [2021-10-16 02:20:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:11,204 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 1038 transitions. [2021-10-16 02:20:11,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1038 transitions. [2021-10-16 02:20:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:11,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:11,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:11,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:11,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:11,418 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:11,419 INFO L82 PathProgramCache]: Analyzing trace with hash 947718493, now seen corresponding path program 5 times [2021-10-16 02:20:11,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:11,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206223268] [2021-10-16 02:20:11,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:11,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:11,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:11,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:11,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:20:11,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:11,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:12,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:12,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:12,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206223268] [2021-10-16 02:20:12,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206223268] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:12,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:20:12,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-16 02:20:12,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286268497] [2021-10-16 02:20:12,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:20:12,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:20:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:20:12,527 INFO L87 Difference]: Start difference. First operand 325 states and 1038 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:13,147 INFO L93 Difference]: Finished difference Result 429 states and 1330 transitions. [2021-10-16 02:20:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:20:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-16 02:20:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:13,152 INFO L225 Difference]: With dead ends: 429 [2021-10-16 02:20:13,152 INFO L226 Difference]: Without dead ends: 423 [2021-10-16 02:20:13,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:20:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-16 02:20:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2021-10-16 02:20:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.174698795180723) internal successors, (1054), 332 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1054 transitions. [2021-10-16 02:20:13,169 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1054 transitions. Word has length 21 [2021-10-16 02:20:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:13,169 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 1054 transitions. [2021-10-16 02:20:13,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1054 transitions. [2021-10-16 02:20:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:13,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:13,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:13,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:13,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:13,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -73655157, now seen corresponding path program 6 times [2021-10-16 02:20:13,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:13,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372955941] [2021-10-16 02:20:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:20:13,385 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:13,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:13,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:20:13,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:20:13,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:13,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:14,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:14,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372955941] [2021-10-16 02:20:14,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372955941] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:14,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:14,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:20:14,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487986170] [2021-10-16 02:20:14,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:20:14,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:20:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:14,151 INFO L87 Difference]: Start difference. First operand 333 states and 1054 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:14,484 INFO L93 Difference]: Finished difference Result 591 states and 1701 transitions. [2021-10-16 02:20:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:20:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:14,490 INFO L225 Difference]: With dead ends: 591 [2021-10-16 02:20:14,490 INFO L226 Difference]: Without dead ends: 569 [2021-10-16 02:20:14,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:20:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-10-16 02:20:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 323. [2021-10-16 02:20:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.18944099378882) internal successors, (1027), 322 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1027 transitions. [2021-10-16 02:20:14,508 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1027 transitions. Word has length 21 [2021-10-16 02:20:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 1027 transitions. [2021-10-16 02:20:14,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1027 transitions. [2021-10-16 02:20:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:14,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:14,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:14,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:14,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:14,722 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1392564933, now seen corresponding path program 2 times [2021-10-16 02:20:14,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:14,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534056398] [2021-10-16 02:20:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:20:14,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:14,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:14,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:20:15,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:15,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:15,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:15,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:15,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534056398] [2021-10-16 02:20:15,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534056398] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:15,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:15,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:20:15,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015169630] [2021-10-16 02:20:15,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:20:15,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:20:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:15,466 INFO L87 Difference]: Start difference. First operand 323 states and 1027 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:15,960 INFO L93 Difference]: Finished difference Result 447 states and 1400 transitions. [2021-10-16 02:20:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:20:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:15,987 INFO L225 Difference]: With dead ends: 447 [2021-10-16 02:20:15,987 INFO L226 Difference]: Without dead ends: 433 [2021-10-16 02:20:15,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:20:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-10-16 02:20:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 377. [2021-10-16 02:20:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.271276595744681) internal successors, (1230), 376 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1230 transitions. [2021-10-16 02:20:16,004 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1230 transitions. Word has length 21 [2021-10-16 02:20:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:16,005 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1230 transitions. [2021-10-16 02:20:16,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1230 transitions. [2021-10-16 02:20:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:16,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:16,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:16,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:16,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:16,219 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash -771718329, now seen corresponding path program 3 times [2021-10-16 02:20:16,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:16,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446969759] [2021-10-16 02:20:16,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:20:16,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:16,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:16,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:16,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:20:16,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:20:16,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:20:16,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:16,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:17,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:17,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446969759] [2021-10-16 02:20:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446969759] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:17,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:17,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-10-16 02:20:17,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351757145] [2021-10-16 02:20:17,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:20:17,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:20:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:20:17,035 INFO L87 Difference]: Start difference. First operand 377 states and 1230 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:17,575 INFO L93 Difference]: Finished difference Result 515 states and 1487 transitions. [2021-10-16 02:20:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:20:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:17,580 INFO L225 Difference]: With dead ends: 515 [2021-10-16 02:20:17,581 INFO L226 Difference]: Without dead ends: 451 [2021-10-16 02:20:17,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:20:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-16 02:20:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 317. [2021-10-16 02:20:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0917721518987342) internal successors, (977), 316 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 977 transitions. [2021-10-16 02:20:17,596 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 977 transitions. Word has length 21 [2021-10-16 02:20:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:17,596 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 977 transitions. [2021-10-16 02:20:17,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 977 transitions. [2021-10-16 02:20:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:20:17,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:17,598 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:17,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:17,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:17,810 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1000088941, now seen corresponding path program 7 times [2021-10-16 02:20:17,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:17,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921791053] [2021-10-16 02:20:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:20:17,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:17,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:17,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:20:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:18,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:18,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921791053] [2021-10-16 02:20:18,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921791053] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:18,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:18,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:20:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195454842] [2021-10-16 02:20:18,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:20:18,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:20:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:18,554 INFO L87 Difference]: Start difference. First operand 317 states and 977 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:18,870 INFO L93 Difference]: Finished difference Result 421 states and 1212 transitions. [2021-10-16 02:20:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:20:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:20:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:18,873 INFO L225 Difference]: With dead ends: 421 [2021-10-16 02:20:18,873 INFO L226 Difference]: Without dead ends: 380 [2021-10-16 02:20:18,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:20:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-16 02:20:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 224. [2021-10-16 02:20:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.1300448430493275) internal successors, (698), 223 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 698 transitions. [2021-10-16 02:20:18,884 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 698 transitions. Word has length 21 [2021-10-16 02:20:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:18,884 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 698 transitions. [2021-10-16 02:20:18,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 698 transitions. [2021-10-16 02:20:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:18,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:18,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:18,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:19,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:19,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash 941183636, now seen corresponding path program 1 times [2021-10-16 02:20:19,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:19,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485010930] [2021-10-16 02:20:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:19,100 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:19,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:19,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:19,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:20:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:19,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:20,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:20,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485010930] [2021-10-16 02:20:20,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485010930] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:20,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [92646934] [2021-10-16 02:20:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:20,036 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:20,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:20,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:20:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:20,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:20,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [92646934] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:20,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939998407] [2021-10-16 02:20:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:20,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:20,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:20,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:20,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:20:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:21,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:21,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939998407] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:21,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:20:21,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 34 [2021-10-16 02:20:21,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117771201] [2021-10-16 02:20:21,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:20:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:20:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 02:20:21,913 INFO L87 Difference]: Start difference. First operand 224 states and 698 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:22,338 INFO L93 Difference]: Finished difference Result 312 states and 951 transitions. [2021-10-16 02:20:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:20:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:22,342 INFO L225 Difference]: With dead ends: 312 [2021-10-16 02:20:22,342 INFO L226 Difference]: Without dead ends: 308 [2021-10-16 02:20:22,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 984.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1183, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 02:20:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-16 02:20:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 226. [2021-10-16 02:20:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.1244444444444444) internal successors, (703), 225 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 703 transitions. [2021-10-16 02:20:22,352 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 703 transitions. Word has length 22 [2021-10-16 02:20:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:22,353 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 703 transitions. [2021-10-16 02:20:22,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 703 transitions. [2021-10-16 02:20:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:22,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:22,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:22,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:22,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:22,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-16 02:20:22,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:22,982 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash 369192970, now seen corresponding path program 2 times [2021-10-16 02:20:22,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:22,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197560597] [2021-10-16 02:20:22,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:20:22,982 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:22,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:22,983 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:22,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:20:23,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:23,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:23,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:23,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:23,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197560597] [2021-10-16 02:20:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197560597] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:23,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [938786090] [2021-10-16 02:20:23,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:20:23,940 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:23,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:23,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:20:24,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:24,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:24,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:24,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:24,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:24,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [938786090] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:24,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:20:24,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2021-10-16 02:20:24,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417453579] [2021-10-16 02:20:24,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:20:24,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:20:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:20:24,868 INFO L87 Difference]: Start difference. First operand 226 states and 703 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:25,078 INFO L93 Difference]: Finished difference Result 296 states and 922 transitions. [2021-10-16 02:20:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:20:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:25,082 INFO L225 Difference]: With dead ends: 296 [2021-10-16 02:20:25,082 INFO L226 Difference]: Without dead ends: 296 [2021-10-16 02:20:25,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:20:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-16 02:20:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 246. [2021-10-16 02:20:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.126530612244898) internal successors, (766), 245 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 766 transitions. [2021-10-16 02:20:25,092 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 766 transitions. Word has length 22 [2021-10-16 02:20:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:25,092 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 766 transitions. [2021-10-16 02:20:25,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 766 transitions. [2021-10-16 02:20:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:25,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:25,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:25,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-10-16 02:20:25,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:25,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:25,498 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1663840756, now seen corresponding path program 3 times [2021-10-16 02:20:25,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:25,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243058392] [2021-10-16 02:20:25,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:20:25,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:25,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:25,500 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:25,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:20:25,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:20:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:25,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:26,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:26,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:26,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243058392] [2021-10-16 02:20:26,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243058392] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:26,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597477039] [2021-10-16 02:20:26,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:20:26,468 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:26,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:26,470 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:26,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 02:20:27,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:20:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:27,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:27,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:27,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:27,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597477039] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:27,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:20:27,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-10-16 02:20:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99723650] [2021-10-16 02:20:27,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:20:27,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:20:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:20:27,502 INFO L87 Difference]: Start difference. First operand 246 states and 766 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:27,797 INFO L93 Difference]: Finished difference Result 352 states and 1092 transitions. [2021-10-16 02:20:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:20:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:27,800 INFO L225 Difference]: With dead ends: 352 [2021-10-16 02:20:27,801 INFO L226 Difference]: Without dead ends: 352 [2021-10-16 02:20:27,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:20:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-10-16 02:20:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 258. [2021-10-16 02:20:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.2412451361867705) internal successors, (833), 257 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 833 transitions. [2021-10-16 02:20:27,811 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 833 transitions. Word has length 22 [2021-10-16 02:20:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 833 transitions. [2021-10-16 02:20:27,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 833 transitions. [2021-10-16 02:20:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:27,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:27,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:27,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:28,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-16 02:20:28,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:28,218 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1799184050, now seen corresponding path program 4 times [2021-10-16 02:20:28,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:28,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655963966] [2021-10-16 02:20:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:28,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:28,219 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:28,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:20:28,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:28,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:28,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:28,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:29,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:29,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655963966] [2021-10-16 02:20:29,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655963966] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561967072] [2021-10-16 02:20:29,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:29,270 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:29,273 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:29,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:20:29,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:29,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:29,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:29,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:30,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:30,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1561967072] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:30,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937667577] [2021-10-16 02:20:30,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:30,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:30,330 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:30,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:20:30,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:30,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:31,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:31,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937667577] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:31,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:20:31,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 35 [2021-10-16 02:20:31,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3458416] [2021-10-16 02:20:31,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:20:31,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:31,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:20:31,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 02:20:31,469 INFO L87 Difference]: Start difference. First operand 258 states and 833 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:31,781 INFO L93 Difference]: Finished difference Result 344 states and 1069 transitions. [2021-10-16 02:20:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:20:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:31,785 INFO L225 Difference]: With dead ends: 344 [2021-10-16 02:20:31,785 INFO L226 Difference]: Without dead ends: 340 [2021-10-16 02:20:31,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 02:20:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-10-16 02:20:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 260. [2021-10-16 02:20:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.2355212355212357) internal successors, (838), 259 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 838 transitions. [2021-10-16 02:20:31,796 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 838 transitions. Word has length 22 [2021-10-16 02:20:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:31,796 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 838 transitions. [2021-10-16 02:20:31,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 838 transitions. [2021-10-16 02:20:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:31,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:31,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:31,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:32,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-16 02:20:32,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-16 02:20:32,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:32,411 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1754545858, now seen corresponding path program 5 times [2021-10-16 02:20:32,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:32,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546349086] [2021-10-16 02:20:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:32,412 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:32,413 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:32,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 02:20:32,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:20:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:33,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:33,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:33,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546349086] [2021-10-16 02:20:33,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546349086] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:33,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [624266569] [2021-10-16 02:20:33,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:33,489 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:33,490 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:33,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-16 02:20:34,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:34,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [624266569] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:34,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756320518] [2021-10-16 02:20:34,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:34,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:34,740 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:34,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-16 02:20:35,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:35,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:35,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:35,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:35,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756320518] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:35,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:20:35,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 7, 7, 8] total 33 [2021-10-16 02:20:35,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550051409] [2021-10-16 02:20:35,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:20:35,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:35,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:20:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 02:20:35,826 INFO L87 Difference]: Start difference. First operand 260 states and 838 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:36,163 INFO L93 Difference]: Finished difference Result 344 states and 1071 transitions. [2021-10-16 02:20:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:20:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:36,166 INFO L225 Difference]: With dead ends: 344 [2021-10-16 02:20:36,166 INFO L226 Difference]: Without dead ends: 342 [2021-10-16 02:20:36,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 901.6ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:20:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-16 02:20:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 262. [2021-10-16 02:20:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2298850574712645) internal successors, (843), 261 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 843 transitions. [2021-10-16 02:20:36,177 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 843 transitions. Word has length 22 [2021-10-16 02:20:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:36,177 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 843 transitions. [2021-10-16 02:20:36,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 843 transitions. [2021-10-16 02:20:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:36,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:36,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:36,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:36,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-16 02:20:36,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:36,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:36,806 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1035618844, now seen corresponding path program 6 times [2021-10-16 02:20:36,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:36,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368158556] [2021-10-16 02:20:36,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:20:36,807 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:36,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:36,808 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:36,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 02:20:37,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:20:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:37,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:38,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368158556] [2021-10-16 02:20:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368158556] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1622647022] [2021-10-16 02:20:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:20:38,083 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:38,084 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:38,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 02:20:38,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:20:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:38,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:39,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1622647022] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:39,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:20:39,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-10-16 02:20:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166212860] [2021-10-16 02:20:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:20:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:20:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:20:39,406 INFO L87 Difference]: Start difference. First operand 262 states and 843 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:39,686 INFO L93 Difference]: Finished difference Result 330 states and 1041 transitions. [2021-10-16 02:20:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:20:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:39,690 INFO L225 Difference]: With dead ends: 330 [2021-10-16 02:20:39,690 INFO L226 Difference]: Without dead ends: 330 [2021-10-16 02:20:39,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:20:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-16 02:20:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2021-10-16 02:20:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.2319391634980987) internal successors, (850), 263 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 850 transitions. [2021-10-16 02:20:39,700 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 850 transitions. Word has length 22 [2021-10-16 02:20:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:39,700 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 850 transitions. [2021-10-16 02:20:39,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 850 transitions. [2021-10-16 02:20:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:39,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:39,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:39,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:39,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-16 02:20:40,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:40,106 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -888979340, now seen corresponding path program 7 times [2021-10-16 02:20:40,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:40,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3208107] [2021-10-16 02:20:40,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:20:40,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:40,108 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:40,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 02:20:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:40,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:40,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:41,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:41,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3208107] [2021-10-16 02:20:41,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3208107] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:41,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [763534662] [2021-10-16 02:20:41,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:20:41,195 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:41,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:41,196 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:41,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-16 02:20:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:42,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:42,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [763534662] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:42,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950398817] [2021-10-16 02:20:42,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:20:42,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:42,432 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:42,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-16 02:20:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:43,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950398817] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:43,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:20:43,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 36 [2021-10-16 02:20:43,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799755826] [2021-10-16 02:20:43,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:20:43,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:20:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:20:43,795 INFO L87 Difference]: Start difference. First operand 264 states and 850 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:44,212 INFO L93 Difference]: Finished difference Result 404 states and 1251 transitions. [2021-10-16 02:20:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:20:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:44,215 INFO L225 Difference]: With dead ends: 404 [2021-10-16 02:20:44,215 INFO L226 Difference]: Without dead ends: 400 [2021-10-16 02:20:44,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 937.8ms TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 02:20:44,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-10-16 02:20:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 268. [2021-10-16 02:20:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.243445692883895) internal successors, (866), 267 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 866 transitions. [2021-10-16 02:20:44,227 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 866 transitions. Word has length 22 [2021-10-16 02:20:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:44,227 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 866 transitions. [2021-10-16 02:20:44,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 866 transitions. [2021-10-16 02:20:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:44,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:44,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:44,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-16 02:20:44,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-16 02:20:44,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-16 02:20:44,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:44,843 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:44,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1460970006, now seen corresponding path program 8 times [2021-10-16 02:20:44,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:44,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065680773] [2021-10-16 02:20:44,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:20:44,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:44,844 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:44,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-16 02:20:45,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:45,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:46,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:46,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065680773] [2021-10-16 02:20:46,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065680773] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:46,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033708266] [2021-10-16 02:20:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:20:46,106 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:46,107 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:46,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-16 02:20:47,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:47,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:47,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:47,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033708266] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:47,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:20:47,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-16 02:20:47,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493237888] [2021-10-16 02:20:47,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:20:47,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:20:47,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:20:47,600 INFO L87 Difference]: Start difference. First operand 268 states and 866 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:47,861 INFO L93 Difference]: Finished difference Result 388 states and 1222 transitions. [2021-10-16 02:20:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:20:47,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:47,864 INFO L225 Difference]: With dead ends: 388 [2021-10-16 02:20:47,864 INFO L226 Difference]: Without dead ends: 388 [2021-10-16 02:20:47,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:20:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-16 02:20:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 284. [2021-10-16 02:20:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3427561837455833) internal successors, (946), 283 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 946 transitions. [2021-10-16 02:20:47,878 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 946 transitions. Word has length 22 [2021-10-16 02:20:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:47,878 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 946 transitions. [2021-10-16 02:20:47,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 946 transitions. [2021-10-16 02:20:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:47,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:47,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:47,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:48,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-16 02:20:48,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:48,285 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1720921830, now seen corresponding path program 9 times [2021-10-16 02:20:48,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:48,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437462138] [2021-10-16 02:20:48,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:20:48,286 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:48,287 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:48,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-16 02:20:49,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:20:49,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:49,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:49,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:49,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:49,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437462138] [2021-10-16 02:20:49,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437462138] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:49,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1102563081] [2021-10-16 02:20:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:20:49,632 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:49,633 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:49,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-10-16 02:20:50,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:20:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:50,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:50,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:51,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1102563081] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:51,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:20:51,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-16 02:20:51,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075551306] [2021-10-16 02:20:51,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:20:51,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:20:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:20:51,111 INFO L87 Difference]: Start difference. First operand 284 states and 946 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:51,350 INFO L93 Difference]: Finished difference Result 408 states and 1268 transitions. [2021-10-16 02:20:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:20:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:51,353 INFO L225 Difference]: With dead ends: 408 [2021-10-16 02:20:51,353 INFO L226 Difference]: Without dead ends: 408 [2021-10-16 02:20:51,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:20:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-10-16 02:20:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 272. [2021-10-16 02:20:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.243542435424354) internal successors, (879), 271 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 879 transitions. [2021-10-16 02:20:51,361 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 879 transitions. Word has length 22 [2021-10-16 02:20:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:51,362 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 879 transitions. [2021-10-16 02:20:51,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 879 transitions. [2021-10-16 02:20:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:51,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:51,363 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:51,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-10-16 02:20:51,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-10-16 02:20:51,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:51,768 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash -773883308, now seen corresponding path program 10 times [2021-10-16 02:20:51,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:51,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233776188] [2021-10-16 02:20:51,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:51,769 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:51,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:51,769 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:51,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-16 02:20:52,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:52,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:20:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:52,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:53,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:53,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233776188] [2021-10-16 02:20:53,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233776188] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:53,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [562394696] [2021-10-16 02:20:53,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:53,051 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:53,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:53,052 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:53,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-16 02:20:54,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:54,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:54,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:54,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:54,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [562394696] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:54,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006463711] [2021-10-16 02:20:54,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:20:54,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:54,516 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:54,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-16 02:20:55,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:20:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:20:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:55,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:55,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006463711] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:20:55,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:20:55,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 7, 7, 8] total 36 [2021-10-16 02:20:55,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494732132] [2021-10-16 02:20:55,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:20:55,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:20:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:20:55,965 INFO L87 Difference]: Start difference. First operand 272 states and 879 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:56,297 INFO L93 Difference]: Finished difference Result 364 states and 1121 transitions. [2021-10-16 02:20:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:20:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:56,299 INFO L225 Difference]: With dead ends: 364 [2021-10-16 02:20:56,299 INFO L226 Difference]: Without dead ends: 360 [2021-10-16 02:20:56,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 960.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-10-16 02:20:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-16 02:20:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 274. [2021-10-16 02:20:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.238095238095238) internal successors, (884), 273 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 884 transitions. [2021-10-16 02:20:56,308 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 884 transitions. Word has length 22 [2021-10-16 02:20:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:56,308 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 884 transitions. [2021-10-16 02:20:56,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 884 transitions. [2021-10-16 02:20:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:56,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:56,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:56,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:56,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-16 02:20:56,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-10-16 02:20:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:56,911 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:20:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash -818521500, now seen corresponding path program 11 times [2021-10-16 02:20:56,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:56,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429594005] [2021-10-16 02:20:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:56,912 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:56,913 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:56,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-16 02:20:57,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:57,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:20:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:57,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:58,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:58,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429594005] [2021-10-16 02:20:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429594005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:58,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546222544] [2021-10-16 02:20:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:58,204 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:58,205 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:58,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-16 02:20:59,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:20:59,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:20:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:59,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:59,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:20:59,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546222544] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:20:59,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488767507] [2021-10-16 02:20:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:20:59,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:59,836 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:59,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-16 02:21:00,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:00,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:01,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488767507] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:21:01,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:21:01,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 7, 7, 8] total 33 [2021-10-16 02:21:01,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911541815] [2021-10-16 02:21:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:21:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:21:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 02:21:01,257 INFO L87 Difference]: Start difference. First operand 274 states and 884 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:01,601 INFO L93 Difference]: Finished difference Result 362 states and 1116 transitions. [2021-10-16 02:21:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:21:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:21:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:01,612 INFO L225 Difference]: With dead ends: 362 [2021-10-16 02:21:01,612 INFO L226 Difference]: Without dead ends: 360 [2021-10-16 02:21:01,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 925.8ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 02:21:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-16 02:21:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-10-16 02:21:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.232727272727273) internal successors, (889), 275 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 889 transitions. [2021-10-16 02:21:01,635 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 889 transitions. Word has length 22 [2021-10-16 02:21:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:01,636 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 889 transitions. [2021-10-16 02:21:01,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 889 transitions. [2021-10-16 02:21:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:21:01,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:01,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:01,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:01,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-16 02:21:02,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:02,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:02,246 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:21:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1537448514, now seen corresponding path program 12 times [2021-10-16 02:21:02,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:02,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691143743] [2021-10-16 02:21:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:21:02,247 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:02,247 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:02,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-16 02:21:03,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:21:03,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:21:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:03,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:03,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691143743] [2021-10-16 02:21:03,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691143743] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:03,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531835760] [2021-10-16 02:21:03,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:21:03,661 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:03,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:03,662 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:03,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-10-16 02:21:04,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:21:04,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:05,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:05,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531835760] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:21:05,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:21:05,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-16 02:21:05,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261529741] [2021-10-16 02:21:05,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:21:05,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:21:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:21:05,257 INFO L87 Difference]: Start difference. First operand 276 states and 889 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:05,482 INFO L93 Difference]: Finished difference Result 348 states and 1088 transitions. [2021-10-16 02:21:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:21:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:21:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:05,486 INFO L225 Difference]: With dead ends: 348 [2021-10-16 02:21:05,486 INFO L226 Difference]: Without dead ends: 348 [2021-10-16 02:21:05,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:21:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-10-16 02:21:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 270. [2021-10-16 02:21:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2342007434944238) internal successors, (870), 269 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 870 transitions. [2021-10-16 02:21:05,496 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 870 transitions. Word has length 22 [2021-10-16 02:21:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:05,496 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 870 transitions. [2021-10-16 02:21:05,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 870 transitions. [2021-10-16 02:21:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:21:05,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:05,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:05,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:05,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-10-16 02:21:05,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:05,898 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:21:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1844052140, now seen corresponding path program 1 times [2021-10-16 02:21:05,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:05,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079400701] [2021-10-16 02:21:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:05,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:05,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:05,900 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:05,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-16 02:21:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:06,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:06,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:07,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:07,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079400701] [2021-10-16 02:21:07,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079400701] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:07,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1643265875] [2021-10-16 02:21:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:07,012 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:07,013 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:07,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-10-16 02:21:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:21:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:08,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:08,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1643265875] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:08,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853888790] [2021-10-16 02:21:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:08,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:08,402 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:08,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-16 02:21:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:09,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:09,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853888790] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:09,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:21:09,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 20 [2021-10-16 02:21:09,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524654258] [2021-10-16 02:21:09,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:21:09,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:21:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:21:09,822 INFO L87 Difference]: Start difference. First operand 270 states and 870 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:10,181 INFO L93 Difference]: Finished difference Result 322 states and 971 transitions. [2021-10-16 02:21:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:21:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:21:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:10,183 INFO L225 Difference]: With dead ends: 322 [2021-10-16 02:21:10,183 INFO L226 Difference]: Without dead ends: 286 [2021-10-16 02:21:10,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-16 02:21:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-10-16 02:21:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 260. [2021-10-16 02:21:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.2316602316602316) internal successors, (837), 259 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 837 transitions. [2021-10-16 02:21:10,189 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 837 transitions. Word has length 22 [2021-10-16 02:21:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:10,190 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 837 transitions. [2021-10-16 02:21:10,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 837 transitions. [2021-10-16 02:21:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:21:10,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:10,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:10,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-16 02:21:10,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-10-16 02:21:10,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-16 02:21:10,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:10,798 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:21:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:10,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1406713312, now seen corresponding path program 2 times [2021-10-16 02:21:10,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:10,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887801957] [2021-10-16 02:21:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:10,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:10,799 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:10,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-16 02:21:11,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:11,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:11,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:12,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:12,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887801957] [2021-10-16 02:21:12,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887801957] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:12,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [706515452] [2021-10-16 02:21:12,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:21:12,087 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:12,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:12,088 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:12,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-10-16 02:21:13,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:21:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:21:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:21:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:13,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:21:13,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [706515452] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:21:13,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:21:13,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 4] total 12 [2021-10-16 02:21:13,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737114605] [2021-10-16 02:21:13,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:21:13,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:21:13,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:21:13,669 INFO L87 Difference]: Start difference. First operand 260 states and 837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:13,733 INFO L93 Difference]: Finished difference Result 242 states and 774 transitions. [2021-10-16 02:21:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:21:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:21:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:13,735 INFO L225 Difference]: With dead ends: 242 [2021-10-16 02:21:13,735 INFO L226 Difference]: Without dead ends: 242 [2021-10-16 02:21:13,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:21:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-16 02:21:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 224. [2021-10-16 02:21:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.1704035874439462) internal successors, (707), 223 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 707 transitions. [2021-10-16 02:21:13,740 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 707 transitions. Word has length 22 [2021-10-16 02:21:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:13,740 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 707 transitions. [2021-10-16 02:21:13,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 707 transitions. [2021-10-16 02:21:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:21:13,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:13,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:13,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:13,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-10-16 02:21:14,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:14,142 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:21:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash 36518286, now seen corresponding path program 1 times [2021-10-16 02:21:14,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:14,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351928957] [2021-10-16 02:21:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:14,142 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:14,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:14,143 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:14,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-16 02:21:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 02:21:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:15,884 INFO L354 Elim1Store]: treesize reduction 262, result has 4.7 percent of original size [2021-10-16 02:21:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 37 [2021-10-16 02:21:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:16,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:16,367 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-16 02:21:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 61 [2021-10-16 02:21:22,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:22,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351928957] [2021-10-16 02:21:22,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-16 02:21:22,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [251287167] [2021-10-16 02:21:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:22,573 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:22,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:22,582 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:22,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-10-16 02:21:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:24,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-16 02:21:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 53 [2021-10-16 02:21:26,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:26,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:26,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:26,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:26,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:26,913 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-16 02:21:26,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 81 treesize of output 101 [2021-10-16 02:21:31,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:31,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:31,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:21:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:24:38,262 WARN L207 SmtUtils]: Spent 3.11 m on a formula simplification. DAG size of input: 347 DAG size of output: 126 [2021-10-16 02:24:38,264 INFO L354 Elim1Store]: treesize reduction 1645, result has 21.1 percent of original size [2021-10-16 02:24:38,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 119 treesize of output 495 [2021-10-16 02:29:42,164 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-16 02:29:42,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-16 02:29:42,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772933803] [2021-10-16 02:29:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:42,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:29:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:29:42,168 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:29:42,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-16 02:29:42,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-16 02:29:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:29:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:43,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:29:43,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:43,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:29:43,779 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:29:43,779 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:29:43,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:29:43,787 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 02:29:43,787 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 02:29:43,787 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 02:29:43,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-10-16 02:29:44,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-10-16 02:29:44,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-16 02:29:44,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c1b6c3-48eb-435e-a190-c2e917e82600/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:29:44,410 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 02:29:44,410 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:29:44,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:29:44 BasicIcfg [2021-10-16 02:29:44,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:29:44,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:29:44,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:29:44,430 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:29:44,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:49" (3/4) ... [2021-10-16 02:29:44,433 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:29:44,434 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:29:44,435 INFO L168 Benchmark]: Toolchain (without parser) took 595975.16 ms. Allocated memory was 69.2 MB in the beginning and 207.6 MB in the end (delta: 138.4 MB). Free memory was 47.6 MB in the beginning and 81.6 MB in the end (delta: -34.0 MB). Peak memory consumption was 104.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:44,447 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 69.2 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:44,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.57 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 50.5 MB in the end (delta: -3.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:44,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.23 ms. Allocated memory is still 69.2 MB. Free memory was 50.5 MB in the beginning and 48.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:44,448 INFO L168 Benchmark]: Boogie Preprocessor took 33.81 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 47.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:44,448 INFO L168 Benchmark]: RCFGBuilder took 620.57 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 49.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:44,449 INFO L168 Benchmark]: TraceAbstraction took 594883.45 ms. Allocated memory was 69.2 MB in the beginning and 207.6 MB in the end (delta: 138.4 MB). Free memory was 49.2 MB in the beginning and 81.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 106.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:44,449 INFO L168 Benchmark]: Witness Printer took 3.86 ms. Allocated memory is still 207.6 MB. Free memory is still 81.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:44,453 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 69.2 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 385.57 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 50.5 MB in the end (delta: -3.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.23 ms. Allocated memory is still 69.2 MB. Free memory was 50.5 MB in the beginning and 48.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.81 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 47.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 620.57 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 49.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 594883.45 ms. Allocated memory was 69.2 MB in the beginning and 207.6 MB in the end (delta: 138.4 MB). Free memory was 49.2 MB in the beginning and 81.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 106.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.86 ms. Allocated memory is still 207.6 MB. Free memory is still 81.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13225.5ms, 141 PlacesBefore, 34 PlacesAfterwards, 143 TransitionsBefore, 28 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 7 FixpointIterations, 73 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 132 TotalNumberOfCompositions, 1798 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1639, positive: 1611, positive conditional: 0, positive unconditional: 1611, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1115, positive: 1107, positive conditional: 0, positive unconditional: 1107, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1115, positive: 1107, positive conditional: 0, positive unconditional: 1107, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 299, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 299, negative conditional: 0, negative unconditional: 299, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1639, positive: 504, positive conditional: 0, positive unconditional: 504, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1115, unknown conditional: 0, unknown unconditional: 1115] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 90]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L41] 0 unsigned int* A; [L42] 0 unsigned int sum1, sum2, sum3; [L43] 0 int M, N; [L72] 0 pthread_t t1, t2, t3; [L75] 0 M = __VERIFIER_nondet_int() [L76] 0 N = __VERIFIER_nondet_int() [L38] COND FALSE 0 !(!cond) [L38] COND TRUE 0 !cond [L99] 0 unsigned int* arr = (unsigned int*)malloc(sizeof(unsigned int) * (size_t)size); [L100] 0 int i = 0; [L100] COND TRUE 0 i < size [L101] 0 arr[i] = __VERIFIER_nondet_int() [L100] 0 i++ [L103] 0 return arr; [L77] 0 A = create_fresh_uint_array(N) [L38] COND TRUE 0 !cond [L82] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L83] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L84] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) [L85] 0 \read(t1) [L64] 3 int i=M; [L64] COND TRUE 3 i