./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF --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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:24:46,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:24:46,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:24:46,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:24:46,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:24:46,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:24:46,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:24:46,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:24:46,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:24:46,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:24:46,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:24:46,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:24:46,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:24:46,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:24:46,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:24:46,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:24:46,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:24:46,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:24:46,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:24:46,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:24:46,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:24:46,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:24:46,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:24:46,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:24:46,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:24:46,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:24:46,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:24:46,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:24:46,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:24:46,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:24:46,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:24:46,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:24:46,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:24:46,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:24:46,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:24:46,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:24:46,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:24:46,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:24:46,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:24:46,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:24:46,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:24:46,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:24:46,231 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:24:46,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:24:46,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:24:46,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:24:46,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:24:46,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:24:46,238 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:24:46,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:24:46,242 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:24:46,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:24:46,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:24:46,243 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:24:46,243 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:24:46,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:24:46,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:24:46,245 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:24:46,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:24:46,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:24:46,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:24:46,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:24:46,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:24:46,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:24:46,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:24:46,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:24:46,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:24:46,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:24:46,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:24:46,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:24:46,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:24:46,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:24:46,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:24:46,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:46,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:24:46,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:24:46,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:24:46,252 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:24:46,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:24:46,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:24:46,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:24:46,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:24:46,253 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_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2021-11-12 22:24:46,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:24:46,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:24:46,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:24:46,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:24:46,545 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:24:46,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-12 22:24:46,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/c05264127/8ac3fe0e396e49ac8c83006b537c44bc/FLAGba9aab64e [2021-11-12 22:24:47,093 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:24:47,094 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-12 22:24:47,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/c05264127/8ac3fe0e396e49ac8c83006b537c44bc/FLAGba9aab64e [2021-11-12 22:24:47,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/c05264127/8ac3fe0e396e49ac8c83006b537c44bc [2021-11-12 22:24:47,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:24:47,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:24:47,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:47,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:24:47,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:24:47,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:47" (1/1) ... [2021-11-12 22:24:47,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ea39f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:47, skipping insertion in model container [2021-11-12 22:24:47,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:47" (1/1) ... [2021-11-12 22:24:47,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:24:47,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:47,776 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_0c1e214a-a87a-4525-8db4-5a95903f006f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-12 22:24:47,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:47,819 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) [2021-11-12 22:24:47,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ae2eeb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:47, skipping insertion in model container [2021-11-12 22:24:47,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:47,820 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:24:47,824 INFO L158 Benchmark]: Toolchain (without parser) took 360.39ms. Allocated memory is still 98.6MB. Free memory was 62.4MB in the beginning and 75.0MB in the end (delta: -12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:24:47,825 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 72.1MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:24:47,828 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.23ms. Allocated memory is still 98.6MB. Free memory was 62.2MB in the beginning and 75.0MB in the end (delta: -12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:24:47,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 72.1MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.23ms. Allocated memory is still 98.6MB. Free memory was 62.2MB in the beginning and 75.0MB in the end (delta: -12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF --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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:24:50,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:24:50,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:24:50,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:24:50,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:24:50,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:24:50,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:24:50,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:24:50,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:24:50,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:24:50,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:24:50,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:24:50,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:24:50,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:24:50,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:24:50,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:24:50,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:24:50,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:24:50,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:24:50,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:24:50,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:24:50,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:24:50,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:24:50,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:24:50,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:24:50,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:24:50,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:24:50,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:24:50,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:24:50,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:24:50,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:24:50,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:24:50,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:24:50,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:24:50,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:24:50,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:24:50,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:24:50,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:24:50,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:24:50,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:24:50,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:24:50,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:24:50,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:24:50,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:24:50,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:24:50,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:24:50,454 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:24:50,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:24:50,454 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:24:50,454 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:24:50,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:24:50,455 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:24:50,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:24:50,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:24:50,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:24:50,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:24:50,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:24:50,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:24:50,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:24:50,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:24:50,460 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:24:50,460 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:24:50,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:24:50,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:24:50,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:24:50,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:24:50,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:24:50,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:24:50,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:24:50,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:50,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:24:50,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:24:50,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:24:50,463 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:24:50,463 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:50,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:24:50,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:24:50,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:24:50,464 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_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2021-11-12 22:24:50,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:24:50,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:24:50,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:24:50,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:24:50,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:24:50,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-12 22:24:50,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/cbe8160af/64e1204495224c2bad9b316604812394/FLAG5119a9aa9 [2021-11-12 22:24:51,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:24:51,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-12 22:24:51,604 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/cbe8160af/64e1204495224c2bad9b316604812394/FLAG5119a9aa9 [2021-11-12 22:24:51,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/data/cbe8160af/64e1204495224c2bad9b316604812394 [2021-11-12 22:24:51,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:24:51,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:24:51,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:51,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:24:51,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:24:51,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:51" (1/1) ... [2021-11-12 22:24:51,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2d9ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:51, skipping insertion in model container [2021-11-12 22:24:51,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:51" (1/1) ... [2021-11-12 22:24:51,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:24:51,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:52,174 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_0c1e214a-a87a-4525-8db4-5a95903f006f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-12 22:24:52,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:52,231 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:24:52,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:52,266 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_0c1e214a-a87a-4525-8db4-5a95903f006f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-12 22:24:52,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:52,295 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:24:52,347 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_0c1e214a-a87a-4525-8db4-5a95903f006f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-12 22:24:52,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:52,386 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:24:52,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52 WrapperNode [2021-11-12 22:24:52,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:52,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:24:52,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:24:52,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:24:52,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:24:52,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:24:52,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:24:52,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:24:52,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:24:52,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:24:52,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:24:52,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:24:52,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (1/1) ... [2021-11-12 22:24:52,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:52,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:52,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:24:52,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:24:52,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:24:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:24:52,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:24:52,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-12 22:24:52,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-12 22:24:52,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-12 22:24:52,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-12 22:24:52,614 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-12 22:24:52,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-12 22:24:52,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-12 22:24:52,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-12 22:24:52,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:24:52,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:24:52,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:24:52,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:24:52,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:24:52,618 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 22:24:53,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:24:53,481 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 22:24:53,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:53 BoogieIcfgContainer [2021-11-12 22:24:53,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:24:53,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:24:53,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:24:53,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:24:53,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:24:51" (1/3) ... [2021-11-12 22:24:53,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dacb482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:53, skipping insertion in model container [2021-11-12 22:24:53,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:52" (2/3) ... [2021-11-12 22:24:53,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dacb482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:53, skipping insertion in model container [2021-11-12 22:24:53,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:53" (3/3) ... [2021-11-12 22:24:53,496 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2021-11-12 22:24:53,503 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 22:24:53,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:24:53,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:24:53,504 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 22:24:53,553 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,554 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,554 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,554 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,562 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,562 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,562 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,565 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,566 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,579 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,579 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,583 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,583 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,583 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,584 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,584 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,584 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,584 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,584 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,585 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,585 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,585 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,585 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,586 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,586 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,586 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,586 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,586 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,586 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,587 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,587 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,587 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,587 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,588 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,588 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,588 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,588 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,588 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,588 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,589 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,589 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,589 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,589 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,589 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,590 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,590 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,590 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,591 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,591 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,591 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,591 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,591 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,592 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,592 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,592 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,592 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,598 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,598 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,598 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,598 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,598 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,599 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,600 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,600 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,600 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,600 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~i~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~tmp~2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,604 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,604 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,604 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,604 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,604 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 22:24:53,608 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-12 22:24:53,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:24:53,664 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2021-11-12 22:24:53,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-12 22:24:53,679 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 22:24:53,694 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 153 transitions, 330 flow [2021-11-12 22:24:53,697 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 153 transitions, 330 flow [2021-11-12 22:24:53,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2021-11-12 22:24:53,778 INFO L129 PetriNetUnfolder]: 12/150 cut-off events. [2021-11-12 22:24:53,778 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-12 22:24:53,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2021-11-12 22:24:53,788 INFO L116 LiptonReduction]: Number of co-enabled transitions 1518 [2021-11-12 22:25:10,026 INFO L131 LiptonReduction]: Checked pairs total: 2300 [2021-11-12 22:25:10,027 INFO L133 LiptonReduction]: Total number of compositions: 142 [2021-11-12 22:25:10,035 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 30 transitions, 84 flow [2021-11-12 22:25:10,057 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:25:10,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:10,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:10,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1793833843, now seen corresponding path program 1 times [2021-11-12 22:25:10,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:10,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556860422] [2021-11-12 22:25:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:10,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:10,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:10,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:25:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:25:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:10,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:10,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:10,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556860422] [2021-11-12 22:25:10,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556860422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:10,796 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:10,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-12 22:25:10,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344324690] [2021-11-12 22:25:10,802 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:10,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:25:10,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:25:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:25:10,836 INFO L87 Difference]: Start difference. First operand has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 0 states have call successors, (0), 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) [2021-11-12 22:25:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:11,062 INFO L93 Difference]: Finished difference Result 332 states and 1054 transitions. [2021-11-12 22:25:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:25:11,066 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 [2021-11-12 22:25:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:11,090 INFO L225 Difference]: With dead ends: 332 [2021-11-12 22:25:11,090 INFO L226 Difference]: Without dead ends: 325 [2021-11-12 22:25:11,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:25:11,096 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:11,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 190.32ms Time] [2021-11-12 22:25:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-12 22:25:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 261. [2021-11-12 22:25:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.173076923076923) internal successors, (825), 260 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 825 transitions. [2021-11-12 22:25:11,190 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 825 transitions. Word has length 20 [2021-11-12 22:25:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:11,191 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 825 transitions. [2021-11-12 22:25:11,194 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) [2021-11-12 22:25:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 825 transitions. [2021-11-12 22:25:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:25:11,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:11,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:11,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:11,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:11,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:11,413 INFO L85 PathProgramCache]: Analyzing trace with hash -705642667, now seen corresponding path program 1 times [2021-11-12 22:25:11,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:11,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983345282] [2021-11-12 22:25:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:11,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:11,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:11,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:11,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:25:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:25:11,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:11,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:11,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:11,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983345282] [2021-11-12 22:25:11,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983345282] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:11,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:25:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-12 22:25:11,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722487717] [2021-11-12 22:25:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:11,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:25:11,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:25:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:25:11,849 INFO L87 Difference]: Start difference. First operand 261 states and 825 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) [2021-11-12 22:25:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:12,221 INFO L93 Difference]: Finished difference Result 507 states and 1547 transitions. [2021-11-12 22:25:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:25:12,222 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 [2021-11-12 22:25:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:12,226 INFO L225 Difference]: With dead ends: 507 [2021-11-12 22:25:12,227 INFO L226 Difference]: Without dead ends: 503 [2021-11-12 22:25:12,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:25:12,228 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:12,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 105 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 312.00ms Time] [2021-11-12 22:25:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-12 22:25:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 383. [2021-11-12 22:25:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2198952879581153) internal successors, (1230), 382 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) [2021-11-12 22:25:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1230 transitions. [2021-11-12 22:25:12,262 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1230 transitions. Word has length 21 [2021-11-12 22:25:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:12,263 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1230 transitions. [2021-11-12 22:25:12,264 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) [2021-11-12 22:25:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1230 transitions. [2021-11-12 22:25:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:12,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:12,273 INFO L514 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] [2021-11-12 22:25:12,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:12,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:12,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1741884638, now seen corresponding path program 1 times [2021-11-12 22:25:12,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:12,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256523300] [2021-11-12 22:25:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:12,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:12,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:12,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:25:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:12,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:13,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:13,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256523300] [2021-11-12 22:25:13,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256523300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:13,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1654316715] [2021-11-12 22:25:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:13,314 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:13,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:13,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:13,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:25:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:13,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:13,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1654316715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:13,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234504465] [2021-11-12 22:25:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:13,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:13,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:14,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:25:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:14,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:14,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:14,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234504465] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:14,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:14,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 8] total 26 [2021-11-12 22:25:14,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598513695] [2021-11-12 22:25:14,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:14,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:14,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:25:14,515 INFO L87 Difference]: Start difference. First operand 383 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:15,688 INFO L93 Difference]: Finished difference Result 569 states and 1804 transitions. [2021-11-12 22:25:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:25:15,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:15,694 INFO L225 Difference]: With dead ends: 569 [2021-11-12 22:25:15,694 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 22:25:15,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:25:15,696 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 730.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.51ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 887.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:15,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 30 Invalid, 403 Unknown, 0 Unchecked, 3.51ms Time], IncrementalHoareTripleChecker [12 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 887.10ms Time] [2021-11-12 22:25:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 22:25:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 399. [2021-11-12 22:25:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.2462311557788945) internal successors, (1292), 398 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1292 transitions. [2021-11-12 22:25:15,729 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1292 transitions. Word has length 22 [2021-11-12 22:25:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1292 transitions. [2021-11-12 22:25:15,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1292 transitions. [2021-11-12 22:25:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:15,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:15,732 INFO L514 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] [2021-11-12 22:25:15,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:15,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:16,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:16,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:16,335 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash -318441572, now seen corresponding path program 2 times [2021-11-12 22:25:16,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:16,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816318971] [2021-11-12 22:25:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:16,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:16,337 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:16,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:25:16,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:16,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:17,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:17,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816318971] [2021-11-12 22:25:17,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816318971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:17,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971722462] [2021-11-12 22:25:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:17,201 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:17,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:17,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:17,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:25:17,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:17,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:17,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971722462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:17,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980652346] [2021-11-12 22:25:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:17,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:17,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:17,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:25:18,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:18,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:18,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:18,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980652346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:18,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:25:18,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 18 [2021-11-12 22:25:18,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824230814] [2021-11-12 22:25:18,500 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:25:18,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:25:18,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:25:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:25:18,502 INFO L87 Difference]: Start difference. First operand 399 states and 1292 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:23,884 INFO L93 Difference]: Finished difference Result 1465 states and 4550 transitions. [2021-11-12 22:25:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 22:25:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:25:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:23,896 INFO L225 Difference]: With dead ends: 1465 [2021-11-12 22:25:23,896 INFO L226 Difference]: Without dead ends: 1465 [2021-11-12 22:25:23,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=779, Invalid=2413, Unknown=0, NotChecked=0, Total=3192 [2021-11-12 22:25:23,899 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 399 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2647.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.71ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3076.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:23,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 130 Invalid, 1757 Unknown, 0 Unchecked, 10.71ms Time], IncrementalHoareTripleChecker [85 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 3076.03ms Time] [2021-11-12 22:25:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-11-12 22:25:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 569. [2021-11-12 22:25:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.3943661971830985) internal successors, (1928), 568 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1928 transitions. [2021-11-12 22:25:23,951 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1928 transitions. Word has length 22 [2021-11-12 22:25:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:23,951 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1928 transitions. [2021-11-12 22:25:23,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1928 transitions. [2021-11-12 22:25:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:23,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:23,954 INFO L514 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] [2021-11-12 22:25:23,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-12 22:25:24,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:24,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:24,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:24,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2010620854, now seen corresponding path program 3 times [2021-11-12 22:25:24,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:24,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429946848] [2021-11-12 22:25:24,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:25:24,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:24,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:24,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:24,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:25:24,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:25:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:24,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:25,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:25,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:25,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429946848] [2021-11-12 22:25:25,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429946848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:25,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614565546] [2021-11-12 22:25:25,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:25:25,310 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:25,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:25:25,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:25:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:25,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614565546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:25,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613801412] [2021-11-12 22:25:25,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:25:25,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:25,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:25,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 22:25:26,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:25:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:26,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:26,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:26,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613801412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:26,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:25:26,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 18 [2021-11-12 22:25:26,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105135315] [2021-11-12 22:25:26,507 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:25:26,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:25:26,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:26,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:25:26,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:25:26,508 INFO L87 Difference]: Start difference. First operand 569 states and 1928 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:30,450 INFO L93 Difference]: Finished difference Result 1247 states and 3870 transitions. [2021-11-12 22:25:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 22:25:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:25:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:30,462 INFO L225 Difference]: With dead ends: 1247 [2021-11-12 22:25:30,462 INFO L226 Difference]: Without dead ends: 1247 [2021-11-12 22:25:30,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=540, Invalid=1440, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:25:30,464 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 409 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2016.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.66ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2326.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:30,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 87 Invalid, 1333 Unknown, 0 Unchecked, 6.66ms Time], IncrementalHoareTripleChecker [66 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 2326.43ms Time] [2021-11-12 22:25:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-12 22:25:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 593. [2021-11-12 22:25:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.3597972972972974) internal successors, (1989), 592 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1989 transitions. [2021-11-12 22:25:30,504 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1989 transitions. Word has length 22 [2021-11-12 22:25:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1989 transitions. [2021-11-12 22:25:30,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1989 transitions. [2021-11-12 22:25:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:30,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:30,507 INFO L514 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] [2021-11-12 22:25:30,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:30,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:30,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:31,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:31,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 642066306, now seen corresponding path program 4 times [2021-11-12 22:25:31,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:31,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647894900] [2021-11-12 22:25:31,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:25:31,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:31,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:31,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:25:31,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:25:31,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:31,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:31,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:31,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647894900] [2021-11-12 22:25:31,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647894900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:31,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1837819756] [2021-11-12 22:25:31,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:25:31,762 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:31,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:31,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:31,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:25:31,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:25:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:32,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1837819756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:32,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992976573] [2021-11-12 22:25:32,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:25:32,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:32,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:32,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:25:32,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:25:32,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:32,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992976573] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:32,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:32,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 8] total 25 [2021-11-12 22:25:32,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084537174] [2021-11-12 22:25:32,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:32,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:32,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:25:32,683 INFO L87 Difference]: Start difference. First operand 593 states and 1989 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:33,635 INFO L93 Difference]: Finished difference Result 959 states and 3162 transitions. [2021-11-12 22:25:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:25:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:33,645 INFO L225 Difference]: With dead ends: 959 [2021-11-12 22:25:33,645 INFO L226 Difference]: Without dead ends: 959 [2021-11-12 22:25:33,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:25:33,646 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 582.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 702.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:33,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 25 Invalid, 358 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 702.05ms Time] [2021-11-12 22:25:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-12 22:25:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 605. [2021-11-12 22:25:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.3890728476821192) internal successors, (2047), 604 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2047 transitions. [2021-11-12 22:25:33,684 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2047 transitions. Word has length 22 [2021-11-12 22:25:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:33,685 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 2047 transitions. [2021-11-12 22:25:33,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2047 transitions. [2021-11-12 22:25:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:33,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:33,688 INFO L514 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] [2021-11-12 22:25:33,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:33,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:34,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-12 22:25:34,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:34,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:34,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1050112976, now seen corresponding path program 5 times [2021-11-12 22:25:34,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:34,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721595455] [2021-11-12 22:25:34,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:25:34,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:34,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:34,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:34,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:25:34,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:34,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:34,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:34,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721595455] [2021-11-12 22:25:34,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721595455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:34,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599388123] [2021-11-12 22:25:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:25:34,971 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:34,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:34,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:25:35,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:35,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:35,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [599388123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:35,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030252971] [2021-11-12 22:25:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:25:35,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:35,598 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:35,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:25:35,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:35,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:35,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:35,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:36,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030252971] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:36,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:36,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 27 [2021-11-12 22:25:36,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341277075] [2021-11-12 22:25:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:36,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:36,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:25:36,149 INFO L87 Difference]: Start difference. First operand 605 states and 2047 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:37,298 INFO L93 Difference]: Finished difference Result 909 states and 2981 transitions. [2021-11-12 22:25:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:25:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:37,307 INFO L225 Difference]: With dead ends: 909 [2021-11-12 22:25:37,307 INFO L226 Difference]: Without dead ends: 909 [2021-11-12 22:25:37,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:25:37,308 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 669.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.45ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 798.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:37,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 29 Invalid, 439 Unknown, 0 Unchecked, 2.45ms Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 798.12ms Time] [2021-11-12 22:25:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-12 22:25:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 599. [2021-11-12 22:25:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.369565217391304) internal successors, (2015), 598 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2015 transitions. [2021-11-12 22:25:37,336 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2015 transitions. Word has length 22 [2021-11-12 22:25:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:37,336 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 2015 transitions. [2021-11-12 22:25:37,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2015 transitions. [2021-11-12 22:25:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:37,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:37,339 INFO L514 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] [2021-11-12 22:25:37,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:37,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:37,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 22:25:37,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:37,942 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash -165762014, now seen corresponding path program 6 times [2021-11-12 22:25:37,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:37,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834881289] [2021-11-12 22:25:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:25:37,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:37,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:37,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:37,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:25:38,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:25:38,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:38,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:38,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:38,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834881289] [2021-11-12 22:25:38,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834881289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:38,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163118255] [2021-11-12 22:25:38,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:25:38,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:38,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:38,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:25:38,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:25:38,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:25:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:38,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:39,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163118255] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:39,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:25:39,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2021-11-12 22:25:39,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964638102] [2021-11-12 22:25:39,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:39,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:39,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:25:39,091 INFO L87 Difference]: Start difference. First operand 599 states and 2015 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) [2021-11-12 22:25:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:39,776 INFO L93 Difference]: Finished difference Result 835 states and 2687 transitions. [2021-11-12 22:25:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:25:39,776 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 [2021-11-12 22:25:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:39,784 INFO L225 Difference]: With dead ends: 835 [2021-11-12 22:25:39,784 INFO L226 Difference]: Without dead ends: 835 [2021-11-12 22:25:39,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:25:39,786 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 427.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 500.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:39,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 34 Invalid, 315 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [11 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 500.88ms Time] [2021-11-12 22:25:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-12 22:25:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 601. [2021-11-12 22:25:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.395) internal successors, (2037), 600 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 2037 transitions. [2021-11-12 22:25:39,810 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 2037 transitions. Word has length 22 [2021-11-12 22:25:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:39,810 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 2037 transitions. [2021-11-12 22:25:39,811 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) [2021-11-12 22:25:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 2037 transitions. [2021-11-12 22:25:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:39,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:39,813 INFO L514 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] [2021-11-12 22:25:39,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:40,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:40,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:40,216 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1903263486, now seen corresponding path program 7 times [2021-11-12 22:25:40,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:40,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158450207] [2021-11-12 22:25:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:25:40,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:40,218 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:40,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:25:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:40,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:40,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158450207] [2021-11-12 22:25:40,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158450207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:40,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599908746] [2021-11-12 22:25:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:25:40,900 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:40,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:40,902 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:40,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:25:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:41,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:41,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [599908746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:41,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586038774] [2021-11-12 22:25:41,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:25:41,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:41,479 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:41,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-12 22:25:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:42,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586038774] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:42,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:42,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 30 [2021-11-12 22:25:42,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815767745] [2021-11-12 22:25:42,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:42,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:42,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:25:42,014 INFO L87 Difference]: Start difference. First operand 601 states and 2037 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:42,813 INFO L93 Difference]: Finished difference Result 819 states and 2765 transitions. [2021-11-12 22:25:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:25:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:42,819 INFO L225 Difference]: With dead ends: 819 [2021-11-12 22:25:42,820 INFO L226 Difference]: Without dead ends: 819 [2021-11-12 22:25:42,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:25:42,821 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 467.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 544.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:42,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 22 Invalid, 295 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 544.30ms Time] [2021-11-12 22:25:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-11-12 22:25:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 629. [2021-11-12 22:25:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.426751592356688) internal successors, (2152), 628 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2152 transitions. [2021-11-12 22:25:42,847 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2152 transitions. Word has length 22 [2021-11-12 22:25:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:42,847 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 2152 transitions. [2021-11-12 22:25:42,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2152 transitions. [2021-11-12 22:25:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:42,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:42,850 INFO L514 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] [2021-11-12 22:25:42,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:43,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:43,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:43,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:43,474 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1232796586, now seen corresponding path program 8 times [2021-11-12 22:25:43,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:43,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363617770] [2021-11-12 22:25:43,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:43,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:43,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:43,475 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:43,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:25:43,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:43,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:44,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:44,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363617770] [2021-11-12 22:25:44,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363617770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:44,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [407388873] [2021-11-12 22:25:44,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:44,040 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:44,041 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:44,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 22:25:44,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:44,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:44,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [407388873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:44,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483002590] [2021-11-12 22:25:44,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:44,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:44,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:44,533 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:44,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-12 22:25:44,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:45,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483002590] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:45,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:45,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 24 [2021-11-12 22:25:45,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106410355] [2021-11-12 22:25:45,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:45,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:45,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:25:45,238 INFO L87 Difference]: Start difference. First operand 629 states and 2152 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:46,122 INFO L93 Difference]: Finished difference Result 871 states and 2935 transitions. [2021-11-12 22:25:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:25:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:46,130 INFO L225 Difference]: With dead ends: 871 [2021-11-12 22:25:46,130 INFO L226 Difference]: Without dead ends: 871 [2021-11-12 22:25:46,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:25:46,132 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 550.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 637.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:46,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 25 Invalid, 338 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [15 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 637.05ms Time] [2021-11-12 22:25:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-12 22:25:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 635. [2021-11-12 22:25:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.4337539432176656) internal successors, (2177), 634 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2177 transitions. [2021-11-12 22:25:46,157 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2177 transitions. Word has length 22 [2021-11-12 22:25:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:46,157 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 2177 transitions. [2021-11-12 22:25:46,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2177 transitions. [2021-11-12 22:25:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:46,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:46,160 INFO L514 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] [2021-11-12 22:25:46,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:46,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:46,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:46,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:46,763 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash -949599178, now seen corresponding path program 9 times [2021-11-12 22:25:46,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:46,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814067675] [2021-11-12 22:25:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:25:46,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:46,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:46,764 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:46,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:25:46,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:25:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:47,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:47,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:47,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814067675] [2021-11-12 22:25:47,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814067675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:47,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109770467] [2021-11-12 22:25:47,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:25:47,365 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:47,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:47,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 22:25:47,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:25:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:25:47,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:47,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:47,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109770467] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:47,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:25:47,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-11-12 22:25:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799877170] [2021-11-12 22:25:47,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:47,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:47,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:25:47,955 INFO L87 Difference]: Start difference. First operand 635 states and 2177 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) [2021-11-12 22:25:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:48,780 INFO L93 Difference]: Finished difference Result 929 states and 3006 transitions. [2021-11-12 22:25:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:25:48,780 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 [2021-11-12 22:25:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:48,786 INFO L225 Difference]: With dead ends: 929 [2021-11-12 22:25:48,786 INFO L226 Difference]: Without dead ends: 929 [2021-11-12 22:25:48,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:25:48,788 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 580.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 666.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:48,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 41 Invalid, 331 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [7 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 666.42ms Time] [2021-11-12 22:25:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-11-12 22:25:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 581. [2021-11-12 22:25:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.339655172413793) internal successors, (1937), 580 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1937 transitions. [2021-11-12 22:25:48,812 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1937 transitions. Word has length 22 [2021-11-12 22:25:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:48,812 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 1937 transitions. [2021-11-12 22:25:48,812 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) [2021-11-12 22:25:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1937 transitions. [2021-11-12 22:25:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:48,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:48,815 INFO L514 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] [2021-11-12 22:25:48,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:49,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-12 22:25:49,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:49,227 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1449130922, now seen corresponding path program 10 times [2021-11-12 22:25:49,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:49,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602009254] [2021-11-12 22:25:49,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:25:49,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:49,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:49,231 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:49,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:25:49,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:25:49,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:49,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:49,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:49,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602009254] [2021-11-12 22:25:49,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602009254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:49,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398854877] [2021-11-12 22:25:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:25:49,803 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:49,804 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:49,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 22:25:49,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:25:49,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:49,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:50,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:50,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [398854877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:50,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230123763] [2021-11-12 22:25:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:25:50,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:50,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:50,272 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:50,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-12 22:25:50,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:25:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:50,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:50,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230123763] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:50,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:50,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 31 [2021-11-12 22:25:50,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552254875] [2021-11-12 22:25:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:50,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:50,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:25:50,886 INFO L87 Difference]: Start difference. First operand 581 states and 1937 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:51,670 INFO L93 Difference]: Finished difference Result 965 states and 3177 transitions. [2021-11-12 22:25:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:25:51,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:51,678 INFO L225 Difference]: With dead ends: 965 [2021-11-12 22:25:51,678 INFO L226 Difference]: Without dead ends: 965 [2021-11-12 22:25:51,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:25:51,680 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 75 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 473.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 549.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:51,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 285 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [11 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 549.37ms Time] [2021-11-12 22:25:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-12 22:25:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 599. [2021-11-12 22:25:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.3946488294314383) internal successors, (2030), 598 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2030 transitions. [2021-11-12 22:25:51,704 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2030 transitions. Word has length 22 [2021-11-12 22:25:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:51,705 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 2030 transitions. [2021-11-12 22:25:51,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2030 transitions. [2021-11-12 22:25:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:51,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:51,708 INFO L514 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] [2021-11-12 22:25:51,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:51,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:52,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 22:25:52,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:52,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash -733264842, now seen corresponding path program 11 times [2021-11-12 22:25:52,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:52,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383210256] [2021-11-12 22:25:52,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:25:52,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:52,337 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:52,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:25:52,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:25:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:52,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:52,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:53,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:53,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383210256] [2021-11-12 22:25:53,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383210256] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:53,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:25:53,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-12 22:25:53,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704623120] [2021-11-12 22:25:53,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:53,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:25:53,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:53,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:25:53,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:25:53,035 INFO L87 Difference]: Start difference. First operand 599 states and 2030 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) 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) [2021-11-12 22:25:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:53,619 INFO L93 Difference]: Finished difference Result 1015 states and 3294 transitions. [2021-11-12 22:25:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:25:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) 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 [2021-11-12 22:25:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:53,625 INFO L225 Difference]: With dead ends: 1015 [2021-11-12 22:25:53,625 INFO L226 Difference]: Without dead ends: 977 [2021-11-12 22:25:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:25:53,626 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 419.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 481.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:53,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 17 Invalid, 320 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 481.13ms Time] [2021-11-12 22:25:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-12 22:25:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-11-12 22:25:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.356741573033708) internal successors, (2390), 712 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2390 transitions. [2021-11-12 22:25:53,656 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2390 transitions. Word has length 22 [2021-11-12 22:25:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:53,656 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 2390 transitions. [2021-11-12 22:25:53,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) 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) [2021-11-12 22:25:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2390 transitions. [2021-11-12 22:25:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:53,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:53,660 INFO L514 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] [2021-11-12 22:25:53,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-12 22:25:53,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:53,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1992238052, now seen corresponding path program 12 times [2021-11-12 22:25:53,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:53,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371113939] [2021-11-12 22:25:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:25:53,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:53,873 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:53,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:25:53,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:25:53,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:54,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:54,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:54,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371113939] [2021-11-12 22:25:54,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371113939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:54,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2003111039] [2021-11-12 22:25:54,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:25:54,473 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:54,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:54,474 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:54,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 22:25:54,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:25:54,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:54,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:54,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:54,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2003111039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:54,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289165933] [2021-11-12 22:25:54,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:25:54,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:54,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:54,962 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:54,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 22:25:55,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:25:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:55,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:55,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:55,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289165933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:55,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:55,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 22 [2021-11-12 22:25:55,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740852845] [2021-11-12 22:25:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:55,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:25:55,574 INFO L87 Difference]: Start difference. First operand 713 states and 2390 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:56,421 INFO L93 Difference]: Finished difference Result 1185 states and 3789 transitions. [2021-11-12 22:25:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:25:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:56,429 INFO L225 Difference]: With dead ends: 1185 [2021-11-12 22:25:56,429 INFO L226 Difference]: Without dead ends: 1185 [2021-11-12 22:25:56,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:25:56,430 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 507.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 610.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:56,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 18 Invalid, 319 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 610.12ms Time] [2021-11-12 22:25:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-12 22:25:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 719. [2021-11-12 22:25:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.3732590529247912) internal successors, (2422), 718 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2422 transitions. [2021-11-12 22:25:56,467 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2422 transitions. Word has length 22 [2021-11-12 22:25:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:56,467 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2422 transitions. [2021-11-12 22:25:56,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2422 transitions. [2021-11-12 22:25:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:56,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:56,471 INFO L514 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] [2021-11-12 22:25:56,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:56,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 22:25:56,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-12 22:25:57,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:57,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:25:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1074287862, now seen corresponding path program 13 times [2021-11-12 22:25:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:57,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243408490] [2021-11-12 22:25:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:25:57,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:57,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:57,086 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:57,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 22:25:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:25:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:57,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:57,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:57,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243408490] [2021-11-12 22:25:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243408490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:57,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227796960] [2021-11-12 22:25:57,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:25:57,688 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:57,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:57,689 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:57,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 22:25:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:25:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:58,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:58,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227796960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:58,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246928775] [2021-11-12 22:25:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:25:58,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:58,182 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:58,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-12 22:25:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:25:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:25:58,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246928775] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:25:58,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:25:58,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 29 [2021-11-12 22:25:58,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418188880] [2021-11-12 22:25:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:25:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:25:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:25:58,710 INFO L87 Difference]: Start difference. First operand 719 states and 2422 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:59,645 INFO L93 Difference]: Finished difference Result 1155 states and 3746 transitions. [2021-11-12 22:25:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:25:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:25:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:59,652 INFO L225 Difference]: With dead ends: 1155 [2021-11-12 22:25:59,653 INFO L226 Difference]: Without dead ends: 1155 [2021-11-12 22:25:59,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:25:59,655 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 120 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 462.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 538.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:59,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 16 Invalid, 279 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [25 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 538.67ms Time] [2021-11-12 22:25:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-11-12 22:25:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 713. [2021-11-12 22:25:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.356741573033708) internal successors, (2390), 712 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2390 transitions. [2021-11-12 22:25:59,682 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2390 transitions. Word has length 22 [2021-11-12 22:25:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 2390 transitions. [2021-11-12 22:25:59,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:25:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2390 transitions. [2021-11-12 22:25:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:25:59,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:59,685 INFO L514 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] [2021-11-12 22:25:59,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:59,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-12 22:26:00,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-12 22:26:00,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:00,302 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash 875050340, now seen corresponding path program 14 times [2021-11-12 22:26:00,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:00,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529140745] [2021-11-12 22:26:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:26:00,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:00,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:00,304 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:00,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 22:26:00,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:00,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:00,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:00,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529140745] [2021-11-12 22:26:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529140745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854717605] [2021-11-12 22:26:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:26:00,954 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:00,955 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:00,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-12 22:26:01,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:01,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:26:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:01,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:01,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854717605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:01,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:26:01,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-11-12 22:26:01,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059501086] [2021-11-12 22:26:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:01,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:26:01,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:26:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:26:01,462 INFO L87 Difference]: Start difference. First operand 713 states and 2390 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) [2021-11-12 22:26:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:02,206 INFO L93 Difference]: Finished difference Result 1055 states and 3371 transitions. [2021-11-12 22:26:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:26:02,207 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 [2021-11-12 22:26:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:02,215 INFO L225 Difference]: With dead ends: 1055 [2021-11-12 22:26:02,215 INFO L226 Difference]: Without dead ends: 1055 [2021-11-12 22:26:02,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:26:02,216 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 449.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 517.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:02,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 33 Invalid, 296 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [15 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 517.01ms Time] [2021-11-12 22:26:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-12 22:26:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 717. [2021-11-12 22:26:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.381284916201117) internal successors, (2421), 716 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2421 transitions. [2021-11-12 22:26:02,255 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2421 transitions. Word has length 22 [2021-11-12 22:26:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:02,255 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2421 transitions. [2021-11-12 22:26:02,256 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) [2021-11-12 22:26:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2421 transitions. [2021-11-12 22:26:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:02,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:02,258 INFO L514 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] [2021-11-12 22:26:02,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:02,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-12 22:26:02,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:02,661 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:02,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1506690614, now seen corresponding path program 15 times [2021-11-12 22:26:02,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:02,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49981795] [2021-11-12 22:26:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:26:02,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:02,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:02,663 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:02,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 22:26:02,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:26:02,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:03,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:03,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:03,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49981795] [2021-11-12 22:26:03,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49981795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:03,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347215064] [2021-11-12 22:26:03,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:26:03,240 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:03,241 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:03,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-12 22:26:03,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:26:03,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:03,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:03,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:03,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:03,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347215064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:03,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977364495] [2021-11-12 22:26:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:26:03,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:03,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:03,721 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:03,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-12 22:26:03,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:26:03,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:26:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:04,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:04,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977364495] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:04,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:26:04,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 20 [2021-11-12 22:26:04,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477668884] [2021-11-12 22:26:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:04,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:26:04,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:26:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:26:04,282 INFO L87 Difference]: Start difference. First operand 717 states and 2421 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:26:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:05,118 INFO L93 Difference]: Finished difference Result 1125 states and 3735 transitions. [2021-11-12 22:26:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:26:05,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:26:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:05,124 INFO L225 Difference]: With dead ends: 1125 [2021-11-12 22:26:05,125 INFO L226 Difference]: Without dead ends: 1125 [2021-11-12 22:26:05,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:26:05,126 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 495.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 574.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:05,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 17 Invalid, 319 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [11 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 574.89ms Time] [2021-11-12 22:26:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-12 22:26:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 711. [2021-11-12 22:26:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.363380281690141) internal successors, (2388), 710 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2388 transitions. [2021-11-12 22:26:05,152 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2388 transitions. Word has length 22 [2021-11-12 22:26:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:05,152 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2388 transitions. [2021-11-12 22:26:05,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:26:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2388 transitions. [2021-11-12 22:26:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:05,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:05,155 INFO L514 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] [2021-11-12 22:26:05,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:05,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-12 22:26:05,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-12 22:26:05,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:05,758 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -63312886, now seen corresponding path program 16 times [2021-11-12 22:26:05,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:05,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951514754] [2021-11-12 22:26:05,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:26:05,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:05,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:05,760 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:05,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 22:26:05,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:26:05,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:05,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:06,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:06,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:06,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951514754] [2021-11-12 22:26:06,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951514754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:06,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1565875432] [2021-11-12 22:26:06,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:26:06,308 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:06,309 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:06,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-12 22:26:06,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:26:06,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:26:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:06,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:06,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1565875432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:06,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549227791] [2021-11-12 22:26:06,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:26:06,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:06,761 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:06,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-12 22:26:06,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:26:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:06,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:26:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:07,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549227791] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:07,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:26:07,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 8] total 28 [2021-11-12 22:26:07,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508375860] [2021-11-12 22:26:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:07,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:26:07,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:26:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:26:07,286 INFO L87 Difference]: Start difference. First operand 711 states and 2388 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:26:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:08,011 INFO L93 Difference]: Finished difference Result 1251 states and 3981 transitions. [2021-11-12 22:26:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:26:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 [2021-11-12 22:26:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:08,017 INFO L225 Difference]: With dead ends: 1251 [2021-11-12 22:26:08,017 INFO L226 Difference]: Without dead ends: 1251 [2021-11-12 22:26:08,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:26:08,019 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 455.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 528.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:08,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 24 Invalid, 294 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [12 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 528.31ms Time] [2021-11-12 22:26:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-12 22:26:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 717. [2021-11-12 22:26:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.36731843575419) internal successors, (2411), 716 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2411 transitions. [2021-11-12 22:26:08,047 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2411 transitions. Word has length 22 [2021-11-12 22:26:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:08,047 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2411 transitions. [2021-11-12 22:26:08,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-11-12 22:26:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2411 transitions. [2021-11-12 22:26:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:08,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:08,050 INFO L514 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] [2021-11-12 22:26:08,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:08,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-12 22:26:08,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-12 22:26:08,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:08,664 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2049258646, now seen corresponding path program 17 times [2021-11-12 22:26:08,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:08,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042342171] [2021-11-12 22:26:08,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:26:08,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:08,667 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:08,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 22:26:08,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:08,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:08,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:09,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:09,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042342171] [2021-11-12 22:26:09,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042342171] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:09,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-12 22:26:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442541180] [2021-11-12 22:26:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:09,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:26:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:26:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:26:09,284 INFO L87 Difference]: Start difference. First operand 717 states and 2411 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) 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) [2021-11-12 22:26:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:09,890 INFO L93 Difference]: Finished difference Result 1091 states and 3558 transitions. [2021-11-12 22:26:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:26:09,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) 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 [2021-11-12 22:26:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:09,895 INFO L225 Difference]: With dead ends: 1091 [2021-11-12 22:26:09,895 INFO L226 Difference]: Without dead ends: 1083 [2021-11-12 22:26:09,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:26:09,896 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 427.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 489.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:09,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 17 Invalid, 286 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [5 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 489.69ms Time] [2021-11-12 22:26:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-12 22:26:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 717. [2021-11-12 22:26:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.36731843575419) internal successors, (2411), 716 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2411 transitions. [2021-11-12 22:26:09,932 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2411 transitions. Word has length 22 [2021-11-12 22:26:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:09,933 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2411 transitions. [2021-11-12 22:26:09,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) 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) [2021-11-12 22:26:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2411 transitions. [2021-11-12 22:26:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:09,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:09,935 INFO L514 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] [2021-11-12 22:26:09,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:10,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:10,147 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash -60151250, now seen corresponding path program 18 times [2021-11-12 22:26:10,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:10,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170610089] [2021-11-12 22:26:10,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:26:10,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:10,149 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:10,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 22:26:10,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:26:10,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:10,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:10,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:10,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170610089] [2021-11-12 22:26:10,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170610089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:10,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745742618] [2021-11-12 22:26:10,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:26:10,705 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:10,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:10,706 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:10,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-12 22:26:10,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:26:10,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:26:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:11,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:26:11,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745742618] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:11,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:26:11,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-11-12 22:26:11,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872641824] [2021-11-12 22:26:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:11,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:26:11,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:26:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:26:11,162 INFO L87 Difference]: Start difference. First operand 717 states and 2411 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) [2021-11-12 22:26:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:11,827 INFO L93 Difference]: Finished difference Result 1095 states and 3535 transitions. [2021-11-12 22:26:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:26:11,828 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 [2021-11-12 22:26:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:11,830 INFO L225 Difference]: With dead ends: 1095 [2021-11-12 22:26:11,830 INFO L226 Difference]: Without dead ends: 1095 [2021-11-12 22:26:11,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:26:11,831 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 447.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 515.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:11,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 39 Invalid, 342 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 515.38ms Time] [2021-11-12 22:26:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-12 22:26:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 693. [2021-11-12 22:26:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.310693641618497) internal successors, (2291), 692 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2291 transitions. [2021-11-12 22:26:11,856 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2291 transitions. Word has length 22 [2021-11-12 22:26:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:11,856 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 2291 transitions. [2021-11-12 22:26:11,857 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) [2021-11-12 22:26:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2291 transitions. [2021-11-12 22:26:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:11,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:11,859 INFO L514 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] [2021-11-12 22:26:11,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-12 22:26:12,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-12 22:26:12,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:12,271 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash -138128460, now seen corresponding path program 1 times [2021-11-12 22:26:12,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:12,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204348322] [2021-11-12 22:26:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:12,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:12,273 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:12,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 22:26:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:12,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:12,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:12,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:12,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204348322] [2021-11-12 22:26:12,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204348322] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:12,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:12,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:26:12,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523780218] [2021-11-12 22:26:12,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:12,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:12,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:12,715 INFO L87 Difference]: Start difference. First operand 693 states and 2291 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:13,132 INFO L93 Difference]: Finished difference Result 999 states and 3179 transitions. [2021-11-12 22:26:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:26:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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 [2021-11-12 22:26:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:13,135 INFO L225 Difference]: With dead ends: 999 [2021-11-12 22:26:13,135 INFO L226 Difference]: Without dead ends: 965 [2021-11-12 22:26:13,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:26:13,136 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 331.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:13,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 11 Invalid, 143 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 331.32ms Time] [2021-11-12 22:26:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-12 22:26:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 673. [2021-11-12 22:26:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.2827380952380953) internal successors, (2206), 672 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2206 transitions. [2021-11-12 22:26:13,158 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2206 transitions. Word has length 22 [2021-11-12 22:26:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:13,158 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2206 transitions. [2021-11-12 22:26:13,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2206 transitions. [2021-11-12 22:26:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:13,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:13,161 INFO L514 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] [2021-11-12 22:26:13,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:13,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:13,372 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 970479200, now seen corresponding path program 1 times [2021-11-12 22:26:13,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:13,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342551790] [2021-11-12 22:26:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:13,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:13,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:13,373 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:13,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-12 22:26:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:13,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:13,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:13,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:13,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:13,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342551790] [2021-11-12 22:26:13,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342551790] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:13,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:13,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:26:13,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910030927] [2021-11-12 22:26:13,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:13,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:13,719 INFO L87 Difference]: Start difference. First operand 673 states and 2206 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:14,125 INFO L93 Difference]: Finished difference Result 1193 states and 3744 transitions. [2021-11-12 22:26:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:26:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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 [2021-11-12 22:26:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:14,129 INFO L225 Difference]: With dead ends: 1193 [2021-11-12 22:26:14,129 INFO L226 Difference]: Without dead ends: 1149 [2021-11-12 22:26:14,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:26:14,130 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:14,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 6 Invalid, 162 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 327.06ms Time] [2021-11-12 22:26:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-12 22:26:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 699. [2021-11-12 22:26:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.348137535816619) internal successors, (2337), 698 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2337 transitions. [2021-11-12 22:26:14,155 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2337 transitions. Word has length 22 [2021-11-12 22:26:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:14,156 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2337 transitions. [2021-11-12 22:26:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2337 transitions. [2021-11-12 22:26:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:14,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:14,158 INFO L514 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] [2021-11-12 22:26:14,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:14,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:14,358 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1300125216, now seen corresponding path program 2 times [2021-11-12 22:26:14,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:14,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677449378] [2021-11-12 22:26:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:26:14,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:14,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:14,360 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:14,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-12 22:26:14,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:14,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:14,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:14,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:14,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677449378] [2021-11-12 22:26:14,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677449378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:14,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:14,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:26:14,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868744063] [2021-11-12 22:26:14,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:14,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:26:14,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:26:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:14,721 INFO L87 Difference]: Start difference. First operand 699 states and 2337 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:15,362 INFO L93 Difference]: Finished difference Result 1081 states and 3446 transitions. [2021-11-12 22:26:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:26:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:26:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:15,365 INFO L225 Difference]: With dead ends: 1081 [2021-11-12 22:26:15,365 INFO L226 Difference]: Without dead ends: 1059 [2021-11-12 22:26:15,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:26:15,366 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 190 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 467.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 537.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:15,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 8 Invalid, 345 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [10 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 537.65ms Time] [2021-11-12 22:26:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-11-12 22:26:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 703. [2021-11-12 22:26:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.321937321937322) internal successors, (2332), 702 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2332 transitions. [2021-11-12 22:26:15,387 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2332 transitions. Word has length 22 [2021-11-12 22:26:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:15,388 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2332 transitions. [2021-11-12 22:26:15,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2332 transitions. [2021-11-12 22:26:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:15,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:15,390 INFO L514 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] [2021-11-12 22:26:15,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:15,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:15,602 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1852519866, now seen corresponding path program 3 times [2021-11-12 22:26:15,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:15,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783761773] [2021-11-12 22:26:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:26:15,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:15,603 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:15,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-12 22:26:15,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 22:26:15,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:15,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:15,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:15,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783761773] [2021-11-12 22:26:15,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783761773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:15,993 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:15,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:26:15,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859015305] [2021-11-12 22:26:15,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:15,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:26:15,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:26:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:15,994 INFO L87 Difference]: Start difference. First operand 703 states and 2332 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:16,556 INFO L93 Difference]: Finished difference Result 861 states and 2758 transitions. [2021-11-12 22:26:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:26:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:26:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:16,559 INFO L225 Difference]: With dead ends: 861 [2021-11-12 22:26:16,559 INFO L226 Difference]: Without dead ends: 827 [2021-11-12 22:26:16,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:26:16,560 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 455.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:16,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 15 Invalid, 289 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [4 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 455.75ms Time] [2021-11-12 22:26:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-12 22:26:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 701. [2021-11-12 22:26:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.322857142857143) internal successors, (2326), 700 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2326 transitions. [2021-11-12 22:26:16,579 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2326 transitions. Word has length 22 [2021-11-12 22:26:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:16,579 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 2326 transitions. [2021-11-12 22:26:16,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2326 transitions. [2021-11-12 22:26:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:16,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:16,587 INFO L514 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] [2021-11-12 22:26:16,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:16,789 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash 775981264, now seen corresponding path program 2 times [2021-11-12 22:26:16,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:16,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438872269] [2021-11-12 22:26:16,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:26:16,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:16,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:16,792 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:16,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-12 22:26:16,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:16,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:17,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:17,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:17,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438872269] [2021-11-12 22:26:17,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438872269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:17,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224605553] [2021-11-12 22:26:17,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:26:17,185 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:17,185 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:17,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-12 22:26:17,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:17,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:17,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:17,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224605553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:17,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:26:17,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 17 [2021-11-12 22:26:17,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545357644] [2021-11-12 22:26:17,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:17,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:26:17,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:26:17,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:26:17,633 INFO L87 Difference]: Start difference. First operand 701 states and 2326 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:17,959 INFO L93 Difference]: Finished difference Result 767 states and 2404 transitions. [2021-11-12 22:26:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-11-12 22:26:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:17,962 INFO L225 Difference]: With dead ends: 767 [2021-11-12 22:26:17,962 INFO L226 Difference]: Without dead ends: 737 [2021-11-12 22:26:17,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:26:17,963 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 230.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:17,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 19 Invalid, 141 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 265.31ms Time] [2021-11-12 22:26:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-12 22:26:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 645. [2021-11-12 22:26:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.2872670807453415) internal successors, (2117), 644 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2117 transitions. [2021-11-12 22:26:17,982 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2117 transitions. Word has length 22 [2021-11-12 22:26:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:17,983 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2117 transitions. [2021-11-12 22:26:17,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2117 transitions. [2021-11-12 22:26:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:17,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:17,985 INFO L514 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] [2021-11-12 22:26:18,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:18,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:18,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:18,399 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash 640788566, now seen corresponding path program 4 times [2021-11-12 22:26:18,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:18,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402766392] [2021-11-12 22:26:18,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:26:18,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:18,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:18,401 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:18,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-12 22:26:18,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:26:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:18,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:18,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:18,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:18,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402766392] [2021-11-12 22:26:18,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402766392] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:18,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:18,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:26:18,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184871900] [2021-11-12 22:26:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:18,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:18,732 INFO L87 Difference]: Start difference. First operand 645 states and 2117 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:19,154 INFO L93 Difference]: Finished difference Result 1125 states and 3631 transitions. [2021-11-12 22:26:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:26:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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 [2021-11-12 22:26:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:19,157 INFO L225 Difference]: With dead ends: 1125 [2021-11-12 22:26:19,157 INFO L226 Difference]: Without dead ends: 1093 [2021-11-12 22:26:19,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:26:19,158 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 343.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:19,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 5 Invalid, 153 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 343.01ms Time] [2021-11-12 22:26:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-11-12 22:26:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 661. [2021-11-12 22:26:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 3.316666666666667) internal successors, (2189), 660 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2189 transitions. [2021-11-12 22:26:19,180 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2189 transitions. Word has length 22 [2021-11-12 22:26:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 2189 transitions. [2021-11-12 22:26:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2189 transitions. [2021-11-12 22:26:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:19,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:19,182 INFO L514 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] [2021-11-12 22:26:19,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-12 22:26:19,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:19,394 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash 970434582, now seen corresponding path program 5 times [2021-11-12 22:26:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:19,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341128667] [2021-11-12 22:26:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:26:19,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:19,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:19,396 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:19,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-12 22:26:19,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:19,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:19,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:19,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:19,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341128667] [2021-11-12 22:26:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341128667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:19,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:19,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:26:19,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138312215] [2021-11-12 22:26:19,791 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:26:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:26:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:19,792 INFO L87 Difference]: Start difference. First operand 661 states and 2189 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:20,383 INFO L93 Difference]: Finished difference Result 1175 states and 3923 transitions. [2021-11-12 22:26:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:26:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 22:26:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:20,387 INFO L225 Difference]: With dead ends: 1175 [2021-11-12 22:26:20,388 INFO L226 Difference]: Without dead ends: 1153 [2021-11-12 22:26:20,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:26:20,389 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 224 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 408.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 470.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:20,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 11 Invalid, 263 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [15 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 470.65ms Time] [2021-11-12 22:26:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-11-12 22:26:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 735. [2021-11-12 22:26:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.3405994550408717) internal successors, (2452), 734 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2452 transitions. [2021-11-12 22:26:20,415 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2452 transitions. Word has length 22 [2021-11-12 22:26:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:20,415 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2452 transitions. [2021-11-12 22:26:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2452 transitions. [2021-11-12 22:26:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:26:20,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:20,418 INFO L514 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] [2021-11-12 22:26:20,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-12 22:26:20,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:20,630 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash -453371386, now seen corresponding path program 6 times [2021-11-12 22:26:20,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:20,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743786760] [2021-11-12 22:26:20,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:26:20,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:20,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:20,632 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:20,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-12 22:26:20,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-12 22:26:20,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:20,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:20,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:20,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743786760] [2021-11-12 22:26:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743786760] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:20,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:20,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-12 22:26:20,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745735336] [2021-11-12 22:26:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:20,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:20,967 INFO L87 Difference]: Start difference. First operand 735 states and 2452 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:21,267 INFO L93 Difference]: Finished difference Result 797 states and 2617 transitions. [2021-11-12 22:26:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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 [2021-11-12 22:26:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:21,269 INFO L225 Difference]: With dead ends: 797 [2021-11-12 22:26:21,270 INFO L226 Difference]: Without dead ends: 698 [2021-11-12 22:26:21,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:26:21,270 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:21,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 11 Invalid, 150 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 270.11ms Time] [2021-11-12 22:26:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-12 22:26:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 480. [2021-11-12 22:26:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.3319415448851775) internal successors, (1596), 479 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1596 transitions. [2021-11-12 22:26:21,282 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1596 transitions. Word has length 22 [2021-11-12 22:26:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:21,283 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1596 transitions. [2021-11-12 22:26:21,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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) [2021-11-12 22:26:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1596 transitions. [2021-11-12 22:26:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 22:26:21,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:21,285 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:21,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-12 22:26:21,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:21,496 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -678870224, now seen corresponding path program 1 times [2021-11-12 22:26:21,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:21,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868565673] [2021-11-12 22:26:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:21,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:21,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:21,498 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:21,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-12 22:26:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:26:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:21,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:22,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868565673] [2021-11-12 22:26:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868565673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453685263] [2021-11-12 22:26:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:22,024 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:22,025 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:22,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-12 22:26:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:22,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:26:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:22,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:22,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453685263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:22,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807275638] [2021-11-12 22:26:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:22,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:22,519 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:22,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-12 22:26:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:22,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:26:22,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:22,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:26:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807275638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:22,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:26:22,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 6, 6] total 24 [2021-11-12 22:26:22,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686772319] [2021-11-12 22:26:22,850 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:26:22,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 22:26:22,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 22:26:22,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:26:22,852 INFO L87 Difference]: Start difference. First operand 480 states and 1596 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:24,697 INFO L93 Difference]: Finished difference Result 1464 states and 4800 transitions. [2021-11-12 22:26:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:26:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 22:26:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:24,706 INFO L225 Difference]: With dead ends: 1464 [2021-11-12 22:26:24,706 INFO L226 Difference]: Without dead ends: 1464 [2021-11-12 22:26:24,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 22:26:24,713 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 440 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1103.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1265.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:24,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 103 Invalid, 1075 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [43 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1265.95ms Time] [2021-11-12 22:26:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-11-12 22:26:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 520. [2021-11-12 22:26:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.296724470134875) internal successors, (1711), 519 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1711 transitions. [2021-11-12 22:26:24,738 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1711 transitions. Word has length 24 [2021-11-12 22:26:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:24,738 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1711 transitions. [2021-11-12 22:26:24,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1711 transitions. [2021-11-12 22:26:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 22:26:24,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:24,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:24,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:24,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-11-12 22:26:25,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-11-12 22:26:25,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:25,356 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 22:26:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 179608233, now seen corresponding path program 1 times [2021-11-12 22:26:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:25,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440408708] [2021-11-12 22:26:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:25,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:25,357 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:25,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1e214a-a87a-4525-8db4-5a95903f006f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-12 22:26:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 22:26:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:25,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2021-11-12 22:26:25,892 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 29 treesize of output 37 [2021-11-12 22:26:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:32,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:33,594 INFO L354 Elim1Store]: treesize reduction 1731, result has 11.9 percent of original size [2021-11-12 22:26:33,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 118 treesize of output 278 [2021-11-12 22:32:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:33,711 WARN L227 SmtUtils]: Spent 1.89m on a formula simplification. DAG size of input: 524 DAG size of output: 232 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:34:33,713 INFO L354 Elim1Store]: treesize reduction 2291, result has 24.0 percent of original size [2021-11-12 22:34:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 81 case distinctions, treesize of input 274 treesize of output 916