./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:03:11,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:03:11,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:03:11,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:03:11,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:03:11,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:03:11,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:03:11,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:03:11,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:03:11,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:03:11,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:03:11,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:03:11,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:03:11,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:03:11,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:03:11,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:03:11,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:03:11,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:03:11,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:03:11,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:03:11,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:03:11,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:03:11,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:03:11,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:03:11,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:03:11,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:03:11,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:03:11,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:03:11,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:03:11,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:03:11,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:03:11,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:03:11,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:03:11,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:03:11,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:03:11,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:03:11,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:03:11,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:03:11,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:03:11,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:03:11,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:03:11,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:03:11,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:03:11,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:03:11,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:03:11,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:03:11,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:03:11,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:03:11,241 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:03:11,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:03:11,242 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:03:11,242 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:03:11,243 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:03:11,243 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:03:11,243 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:03:11,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:03:11,244 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:03:11,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:03:11,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:03:11,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:03:11,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:03:11,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:03:11,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:03:11,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:03:11,248 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:03:11,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:03:11,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:03:11,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:03:11,251 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:03:11,251 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:03:11,251 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:03:11,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:03:11,252 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:03:11,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:03:11,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:03:11,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:03:11,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:03:11,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:03:11,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:03:11,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:03:11,256 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:03:11,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:03:11,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:03:11,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:03:11,258 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_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2021-11-23 02:03:11,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:03:11,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:03:11,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:03:11,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:03:11,619 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:03:11,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-23 02:03:11,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/56d0689ee/ad74840e3ce6459cabf692213c7e2f95/FLAG558b0c413 [2021-11-23 02:03:12,358 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:03:12,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-23 02:03:12,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/56d0689ee/ad74840e3ce6459cabf692213c7e2f95/FLAG558b0c413 [2021-11-23 02:03:12,620 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/56d0689ee/ad74840e3ce6459cabf692213c7e2f95 [2021-11-23 02:03:12,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:03:12,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:03:12,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:03:12,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:03:12,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:03:12,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:03:12" (1/1) ... [2021-11-23 02:03:12,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77027fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:12, skipping insertion in model container [2021-11-23 02:03:12,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:03:12" (1/1) ... [2021-11-23 02:03:12,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:03:12,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:03:13,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:03:13,246 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) [2021-11-23 02:03:13,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32f66871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:13, skipping insertion in model container [2021-11-23 02:03:13,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:03:13,247 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 02:03:13,250 INFO L158 Benchmark]: Toolchain (without parser) took 623.78ms. Allocated memory is still 115.3MB. Free memory was 78.8MB in the beginning and 86.2MB in the end (delta: -7.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:03:13,251 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 58.7MB in the beginning and 58.7MB in the end (delta: 32.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:03:13,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 620.43ms. Allocated memory is still 115.3MB. Free memory was 78.6MB in the beginning and 86.2MB in the end (delta: -7.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:03:13,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 58.7MB in the beginning and 58.7MB in the end (delta: 32.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 620.43ms. Allocated memory is still 115.3MB. Free memory was 78.6MB in the beginning and 86.2MB in the end (delta: -7.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:03:16,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:03:16,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:03:16,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:03:16,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:03:16,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:03:16,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:03:16,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:03:16,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:03:16,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:03:16,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:03:16,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:03:16,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:03:16,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:03:16,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:03:16,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:03:16,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:03:16,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:03:16,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:03:16,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:03:16,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:03:16,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:03:16,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:03:16,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:03:16,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:03:16,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:03:16,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:03:16,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:03:16,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:03:16,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:03:16,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:03:16,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:03:16,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:03:16,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:03:16,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:03:16,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:03:16,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:03:16,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:03:16,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:03:16,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:03:16,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:03:16,186 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:03:16,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:03:16,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:03:16,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:03:16,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:03:16,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:03:16,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:03:16,218 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:03:16,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:03:16,218 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:03:16,219 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:03:16,219 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:03:16,219 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:03:16,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:03:16,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:03:16,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:03:16,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:03:16,221 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:03:16,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:03:16,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:03:16,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:03:16,221 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:03:16,222 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:03:16,222 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:03:16,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:03:16,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:03:16,222 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:03:16,223 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:03:16,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:03:16,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:03:16,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:03:16,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:03:16,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:03:16,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:03:16,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:03:16,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:03:16,225 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:03:16,225 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:03:16,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:03:16,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:03:16,225 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_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2021-11-23 02:03:16,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:03:16,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:03:16,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:03:16,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:03:16,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:03:16,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-23 02:03:16,907 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/8bb53e7a3/e5c3a42c9b5144829a686ae6b1d76b0c/FLAGdb9381e8b [2021-11-23 02:03:17,607 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:03:17,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2021-11-23 02:03:17,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/8bb53e7a3/e5c3a42c9b5144829a686ae6b1d76b0c/FLAGdb9381e8b [2021-11-23 02:03:17,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/data/8bb53e7a3/e5c3a42c9b5144829a686ae6b1d76b0c [2021-11-23 02:03:17,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:03:17,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:03:17,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:03:17,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:03:17,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:03:17,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:03:17" (1/1) ... [2021-11-23 02:03:17,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3887f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:17, skipping insertion in model container [2021-11-23 02:03:17,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:03:17" (1/1) ... [2021-11-23 02:03:17,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:03:17,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:03:18,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:03:18,353 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:03:18,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:03:18,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:03:18,430 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:03:18,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:03:18,556 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:03:18,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18 WrapperNode [2021-11-23 02:03:18,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:03:18,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:03:18,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:03:18,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:03:18,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,618 INFO L137 Inliner]: procedures = 169, calls = 88, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 96 [2021-11-23 02:03:18,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:03:18,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:03:18,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:03:18,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:03:18,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:03:18,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:03:18,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:03:18,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:03:18,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (1/1) ... [2021-11-23 02:03:18,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:03:18,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:18,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:03:18,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:03:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:03:18,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:03:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2021-11-23 02:03:18,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:03:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:03:18,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:03:18,868 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:03:18,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:03:19,262 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:03:19,270 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:03:19,271 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:03:19,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:03:19 BoogieIcfgContainer [2021-11-23 02:03:19,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:03:19,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:03:19,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:03:19,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:03:19,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:03:17" (1/3) ... [2021-11-23 02:03:19,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0e104c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:03:19, skipping insertion in model container [2021-11-23 02:03:19,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:18" (2/3) ... [2021-11-23 02:03:19,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0e104c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:03:19, skipping insertion in model container [2021-11-23 02:03:19,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:03:19" (3/3) ... [2021-11-23 02:03:19,281 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11_1.i [2021-11-23 02:03:19,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:03:19,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2021-11-23 02:03:19,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:03:19,368 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-23 02:03:19,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2021-11-23 02:03:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:03:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:03:19,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:19,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:19,413 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:03:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2113619829, now seen corresponding path program 1 times [2021-11-23 02:03:19,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847825329] [2021-11-23 02:03:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:19,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:19,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:03:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:19,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:03:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:19,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:19,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:19,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847825329] [2021-11-23 02:03:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847825329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:19,783 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:19,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:03:19,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265394443] [2021-11-23 02:03:19,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:19,831 INFO L87 Difference]: Start difference. First operand has 90 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:03:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:20,017 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2021-11-23 02:03:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:03:20,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:03:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:20,040 INFO L225 Difference]: With dead ends: 167 [2021-11-23 02:03:20,040 INFO L226 Difference]: Without dead ends: 163 [2021-11-23 02:03:20,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:20,058 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 73 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:20,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 554 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:03:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-23 02:03:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 92. [2021-11-23 02:03:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 82 states have internal predecessors, (88), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-23 02:03:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2021-11-23 02:03:20,120 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 11 [2021-11-23 02:03:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:20,120 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2021-11-23 02:03:20,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:03:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2021-11-23 02:03:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:03:20,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:20,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:20,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:20,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:03:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1293843786, now seen corresponding path program 1 times [2021-11-23 02:03:20,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:20,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460861414] [2021-11-23 02:03:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:20,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:20,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:20,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:20,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:03:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:03:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:20,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:20,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460861414] [2021-11-23 02:03:20,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460861414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:20,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:20,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:03:20,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095097332] [2021-11-23 02:03:20,526 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:20,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:03:20,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:03:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:03:20,529 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:03:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:20,810 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2021-11-23 02:03:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:03:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:03:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:20,813 INFO L225 Difference]: With dead ends: 163 [2021-11-23 02:03:20,813 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 02:03:20,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:03:20,815 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 70 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:20,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 321 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:03:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 02:03:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 88. [2021-11-23 02:03:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.68) internal successors, (84), 79 states have internal predecessors, (84), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:03:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-11-23 02:03:20,832 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 11 [2021-11-23 02:03:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:20,832 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-11-23 02:03:20,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:03:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-11-23 02:03:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:03:20,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:20,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:20,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:03:21,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:21,038 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:03:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1793026591, now seen corresponding path program 1 times [2021-11-23 02:03:21,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:21,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533648824] [2021-11-23 02:03:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:21,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:21,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:21,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:21,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:03:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:03:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:03:21,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:03:21,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:21,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533648824] [2021-11-23 02:03:21,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533648824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:21,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:21,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:03:21,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857735364] [2021-11-23 02:03:21,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:21,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:21,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:21,283 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:03:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:21,375 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2021-11-23 02:03:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:03:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-23 02:03:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:21,380 INFO L225 Difference]: With dead ends: 160 [2021-11-23 02:03:21,382 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 02:03:21,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:21,384 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 68 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:21,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 470 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:03:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 02:03:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 92. [2021-11-23 02:03:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 82 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-23 02:03:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-11-23 02:03:21,410 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 17 [2021-11-23 02:03:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:21,411 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-11-23 02:03:21,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:03:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-11-23 02:03:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:03:21,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:21,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:21,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:21,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:21,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:03:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1793026607, now seen corresponding path program 1 times [2021-11-23 02:03:21,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:21,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721421964] [2021-11-23 02:03:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:21,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:21,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:21,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:03:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:03:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:03:21,908 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:03:21,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-11-23 02:03:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:22,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:33,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721421964] [2021-11-23 02:03:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721421964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607437386] [2021-11-23 02:03:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:33,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:03:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:03:33,020 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:03:33,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 02:03:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:03:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:33,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:03:33,261 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:03:33,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-23 02:03:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:33,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:39,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [607437386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:39,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883903340] [2021-11-23 02:03:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:39,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:39,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:39,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:03:39,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:03:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:03:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:40,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:03:40,095 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:03:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-11-23 02:03:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:46,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883903340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:46,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:03:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 02:03:46,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576620737] [2021-11-23 02:03:46,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:03:46,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:03:46,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:03:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2021-11-23 02:03:46,660 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:03:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:46,909 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-11-23 02:03:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:03:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 17 [2021-11-23 02:03:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:46,912 INFO L225 Difference]: With dead ends: 106 [2021-11-23 02:03:46,912 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 02:03:46,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=39, Invalid=138, Unknown=5, NotChecked=0, Total=182 [2021-11-23 02:03:46,913 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 18 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:46,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 587 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 353 Unchecked, 0.2s Time] [2021-11-23 02:03:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 02:03:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-11-23 02:03:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.6031746031746033) internal successors, (101), 90 states have internal predecessors, (101), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:03:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-11-23 02:03:46,929 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 17 [2021-11-23 02:03:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:46,929 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-11-23 02:03:46,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:03:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-11-23 02:03:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:03:46,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:46,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:46,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:47,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:47,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:47,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:47,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:03:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:47,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1793026606, now seen corresponding path program 1 times [2021-11-23 02:03:47,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:47,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503829313] [2021-11-23 02:03:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:47,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:47,547 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:47,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:03:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:03:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:03:47,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:03:49,875 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:03:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:03:49,889 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:03:49,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-11-23 02:03:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:49,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:02,367 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 29 treesize of output 27 [2021-11-23 02:04:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:02,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:04:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503829313] [2021-11-23 02:04:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503829313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1176707405] [2021-11-23 02:04:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:02,489 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:04:02,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:04:02,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:04:02,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:04:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:04:02,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:02,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:04:02,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:04:02,765 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:04:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-23 02:04:02,776 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:04:02,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:04:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:02,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:13,435 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_53| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4|) (select (store |c_#length| |v_ldv_malloc_#res.base_53| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_10|))) (bvule |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4|))) (exists ((|v_ldv_malloc_#res.base_44| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_44|))))) (or (not (bvule |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4|))) (exists ((v_ldv_malloc_~size_39 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_4|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_44| v_ldv_malloc_~size_39) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_10|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_53|)))))) is different from true [2021-11-23 02:04:14,433 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 27 treesize of output 25 [2021-11-23 02:04:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 02:04:14,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1176707405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18537246] [2021-11-23 02:04:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:14,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:14,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:14,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:04:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:14,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:04:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:14,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:04:14,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:04:14,671 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:04:14,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:04:14,682 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:04:14,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 02:04:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:14,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:43,237 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 29 treesize of output 27 [2021-11-23 02:04:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:43,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18537246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:43,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:04:43,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2021-11-23 02:04:43,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770664689] [2021-11-23 02:04:43,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:04:43,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:04:43,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:04:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:04:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=277, Unknown=19, NotChecked=34, Total=380 [2021-11-23 02:04:43,250 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:04:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:56,467 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-11-23 02:04:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:04:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 17 [2021-11-23 02:04:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:56,469 INFO L225 Difference]: With dead ends: 116 [2021-11-23 02:04:56,469 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 02:04:56,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=81, Invalid=405, Unknown=24, NotChecked=42, Total=552 [2021-11-23 02:04:56,470 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 22 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 498 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:56,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 816 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 194 Invalid, 0 Unknown, 498 Unchecked, 0.5s Time] [2021-11-23 02:04:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 02:04:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2021-11-23 02:04:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:04:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2021-11-23 02:04:56,484 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 17 [2021-11-23 02:04:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:56,485 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2021-11-23 02:04:56,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:04:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2021-11-23 02:04:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:04:56,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:56,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:56,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:56,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:56,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:57,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:57,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:04:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2086429614, now seen corresponding path program 1 times [2021-11-23 02:04:57,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:04:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989423506] [2021-11-23 02:04:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:57,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:04:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:04:57,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:04:57,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:04:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:04:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:57,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:04:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989423506] [2021-11-23 02:04:57,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989423506] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:57,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:04:57,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:04:57,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999816332] [2021-11-23 02:04:57,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:57,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:04:57,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:04:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:04:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:57,317 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:04:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:57,368 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-11-23 02:04:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:04:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-23 02:04:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:57,372 INFO L225 Difference]: With dead ends: 101 [2021-11-23 02:04:57,372 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 02:04:57,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:57,373 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 0 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:57,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 378 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:04:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 02:04:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-23 02:04:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 88 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 02:04:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-11-23 02:04:57,389 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 17 [2021-11-23 02:04:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:57,393 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-11-23 02:04:57,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:04:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-11-23 02:04:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:04:57,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:57,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:57,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:57,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:04:57,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:04:57,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:57,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1138254343, now seen corresponding path program 1 times [2021-11-23 02:04:57,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:04:57,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651009133] [2021-11-23 02:04:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:57,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:04:57,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:04:57,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:04:57,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:04:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:57,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:04:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:58,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:04:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651009133] [2021-11-23 02:04:58,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651009133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [376555762] [2021-11-23 02:04:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:58,150 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:04:58,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:04:58,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:04:58,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 02:04:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:58,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:04:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:58,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [376555762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:58,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242321985] [2021-11-23 02:04:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:58,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:58,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:58,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:04:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:58,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:04:58,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:58,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242321985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:58,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:04:58,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2021-11-23 02:04:58,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035331841] [2021-11-23 02:04:58,599 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:04:58,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:04:58,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:04:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:04:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:04:58,600 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:04:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:58,901 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-23 02:04:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:04:58,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2021-11-23 02:04:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:58,902 INFO L225 Difference]: With dead ends: 98 [2021-11-23 02:04:58,903 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 02:04:58,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:04:58,904 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 145 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:58,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2021-11-23 02:04:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 02:04:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-23 02:04:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 87 states have internal predecessors, (92), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 02:04:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2021-11-23 02:04:58,911 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 18 [2021-11-23 02:04:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:58,911 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2021-11-23 02:04:58,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:04:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2021-11-23 02:04:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:04:58,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:58,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:58,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:59,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:59,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:59,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:04:59,513 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:04:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash 968466533, now seen corresponding path program 1 times [2021-11-23 02:04:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:04:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480999010] [2021-11-23 02:04:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:59,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:04:59,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:04:59,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:04:59,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:04:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:04:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:59,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:05,758 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ldv_malloc_#res.base_101| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_101|)))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret43#1.base_58| (_ BitVec 32))) (and (not (= (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_58| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6|)) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_58|)))))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (store |c_#valid| |v_ldv_malloc_#res.base_101| (_ bv0 1))))) is different from false [2021-11-23 02:05:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:05:05,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:05:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480999010] [2021-11-23 02:05:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480999010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1393970387] [2021-11-23 02:05:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:05,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:05:05,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:05:05,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:05:05,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 02:05:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:05,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:05:05,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:06,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:14,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_10| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ldv_malloc_#res.base_109| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret43#1.base_58| (_ BitVec 32))) (and (not (= (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_58| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_10|)) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_58|)))))) (= (store |c_#valid| |v_ldv_malloc_#res.base_109| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_10|) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_109|))))))) is different from false [2021-11-23 02:05:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:05:14,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1393970387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566421309] [2021-11-23 02:05:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:14,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:14,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:14,957 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:14,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:05:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:15,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:05:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:15,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:21,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566421309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:21,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:05:21,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6, 8, 7, 8] total 20 [2021-11-23 02:05:21,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83765261] [2021-11-23 02:05:21,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:05:21,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:05:21,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:05:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:05:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=253, Unknown=41, NotChecked=70, Total=420 [2021-11-23 02:05:21,991 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 02:05:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:22,510 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-11-23 02:05:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:05:22,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2021-11-23 02:05:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:22,512 INFO L225 Difference]: With dead ends: 108 [2021-11-23 02:05:22,512 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 02:05:22,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=88, Invalid=423, Unknown=49, NotChecked=90, Total=650 [2021-11-23 02:05:22,514 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 97 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:22,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 471 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 166 Invalid, 0 Unknown, 352 Unchecked, 0.3s Time] [2021-11-23 02:05:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 02:05:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2021-11-23 02:05:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 82 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:05:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-11-23 02:05:22,520 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 21 [2021-11-23 02:05:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:22,521 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-11-23 02:05:22,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 02:05:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-11-23 02:05:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:05:22,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:22,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:22,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:22,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-23 02:05:22,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-23 02:05:23,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:05:23,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:05:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash -406257806, now seen corresponding path program 1 times [2021-11-23 02:05:23,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:05:23,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526590013] [2021-11-23 02:05:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:23,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:05:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:05:23,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:05:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 02:05:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:23,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:05:23,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:23,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:05:23,370 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:05:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-11-23 02:05:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:23,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:23,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:05:23,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526590013] [2021-11-23 02:05:23,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526590013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:23,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495938111] [2021-11-23 02:05:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:23,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:05:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:05:23,680 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:05:23,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 02:05:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:05:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:23,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:05:23,930 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:05:23,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-23 02:05:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:24,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:46,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [495938111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103234070] [2021-11-23 02:05:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:46,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:46,302 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:46,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 02:05:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:05:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:46,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:05:46,515 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:05:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-11-23 02:05:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:46,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:06:07,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103234070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:07,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:06:07,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7, 7, 7, 7] total 14 [2021-11-23 02:06:07,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821218850] [2021-11-23 02:06:07,383 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:06:07,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:06:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=157, Unknown=10, NotChecked=0, Total=210 [2021-11-23 02:06:07,385 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:06:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:07,561 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2021-11-23 02:06:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:06:07,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 25 [2021-11-23 02:06:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:07,563 INFO L225 Difference]: With dead ends: 119 [2021-11-23 02:06:07,563 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 02:06:07,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 18 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=52, Invalid=178, Unknown=10, NotChecked=0, Total=240 [2021-11-23 02:06:07,564 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 27 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:07,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 507 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 215 Unchecked, 0.1s Time] [2021-11-23 02:06:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 02:06:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-11-23 02:06:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 92 states have internal predecessors, (100), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-23 02:06:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-11-23 02:06:07,572 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 25 [2021-11-23 02:06:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:07,572 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-11-23 02:06:07,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:06:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-11-23 02:06:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:06:07,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:07,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:07,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:07,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:07,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:08,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:08,189 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:06:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash -406257805, now seen corresponding path program 1 times [2021-11-23 02:06:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:08,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622898220] [2021-11-23 02:06:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:08,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:08,191 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 02:06:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:06:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:08,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:06:12,550 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:06:12,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 02:06:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:12,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:14,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:14,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622898220] [2021-11-23 02:06:14,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622898220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:14,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2003234814] [2021-11-23 02:06:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:14,698 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:14,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:14,699 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:14,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 02:06:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:06:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:06:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:06:23,503 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:06:23,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-23 02:06:23,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:06:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:06:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:23,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:47,355 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 29 treesize of output 27 [2021-11-23 02:06:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:47,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2003234814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:47,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369461429] [2021-11-23 02:06:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:47,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:47,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:47,376 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:47,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:06:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:47,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:06:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:47,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:06:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:06:47,722 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:06:47,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:06:47,742 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:06:47,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 02:06:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:47,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:01,383 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_12| (_ BitVec 32))) (or (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6|) (select (store |c_#length| |v_ldv_malloc_#res.base_176| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_12|))) (bvule |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6|))) (exists ((|v_ldv_malloc_#res.base_164| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_164|)))))) (or (not (bvule |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6|))) (exists ((v_ldv_malloc_~size_152 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_6|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_164| v_ldv_malloc_~size_152) |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_12|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_176|)))))) is different from true [2021-11-23 02:07:02,509 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 30 treesize of output 28 [2021-11-23 02:07:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-23 02:07:02,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369461429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:02,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:07:02,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 27 [2021-11-23 02:07:02,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663561700] [2021-11-23 02:07:02,540 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:02,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 02:07:02,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:02,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 02:07:02,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=607, Unknown=17, NotChecked=50, Total=756 [2021-11-23 02:07:02,542 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 23 states have internal predecessors, (50), 5 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:07:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:15,503 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2021-11-23 02:07:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:07:15,505 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 23 states have internal predecessors, (50), 5 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 25 [2021-11-23 02:07:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:15,506 INFO L225 Difference]: With dead ends: 156 [2021-11-23 02:07:15,507 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 02:07:15,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=115, Invalid=739, Unknown=20, NotChecked=56, Total=930 [2021-11-23 02:07:15,508 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 90 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:15,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 803 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 659 Unchecked, 0.3s Time] [2021-11-23 02:07:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 02:07:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 115. [2021-11-23 02:07:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 99 states have internal predecessors, (108), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-23 02:07:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-11-23 02:07:15,515 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 25 [2021-11-23 02:07:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:15,516 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-11-23 02:07:15,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 23 states have internal predecessors, (50), 5 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:07:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-11-23 02:07:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:07:15,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:15,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:15,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-23 02:07:15,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:15,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:16,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:16,128 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:07:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash -377628656, now seen corresponding path program 1 times [2021-11-23 02:07:16,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:16,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057494967] [2021-11-23 02:07:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:16,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:16,133 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:16,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 02:07:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:07:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:16,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:16,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:16,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057494967] [2021-11-23 02:07:16,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057494967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431385755] [2021-11-23 02:07:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:16,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:07:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:07:16,349 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:07:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 02:07:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:07:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:16,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:16,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431385755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:16,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645915899] [2021-11-23 02:07:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:16,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:16,580 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:16,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 02:07:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:16,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:07:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:16,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645915899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:16,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:07:16,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-11-23 02:07:16,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688640188] [2021-11-23 02:07:16,767 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:16,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:16,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:16,768 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:07:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:16,817 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-23 02:07:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-23 02:07:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:16,820 INFO L225 Difference]: With dead ends: 114 [2021-11-23 02:07:16,820 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 02:07:16,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:16,821 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 60 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:16,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 271 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:07:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 02:07:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-11-23 02:07:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 94 states have internal predecessors, (102), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-23 02:07:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2021-11-23 02:07:16,827 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 25 [2021-11-23 02:07:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:16,827 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2021-11-23 02:07:16,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:07:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2021-11-23 02:07:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:07:16,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:16,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:16,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:17,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:17,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:17,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:17,461 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:07:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -911816431, now seen corresponding path program 1 times [2021-11-23 02:07:17,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:17,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844484288] [2021-11-23 02:07:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:17,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:17,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:17,463 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 02:07:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:07:17,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:17,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:17,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844484288] [2021-11-23 02:07:17,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844484288] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:17,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:07:17,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:07:17,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99194937] [2021-11-23 02:07:17,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:17,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:17,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:17,747 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:07:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:17,784 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-11-23 02:07:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-23 02:07:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:17,787 INFO L225 Difference]: With dead ends: 102 [2021-11-23 02:07:17,787 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 02:07:17,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:17,788 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 0 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:17,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 356 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:07:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 02:07:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-11-23 02:07:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 82 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:07:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-11-23 02:07:17,793 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 25 [2021-11-23 02:07:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:17,793 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-11-23 02:07:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:07:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-11-23 02:07:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:07:17,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:17,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:17,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:18,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:18,006 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:07:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 290909999, now seen corresponding path program 1 times [2021-11-23 02:07:18,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682586200] [2021-11-23 02:07:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:18,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:18,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:18,008 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:18,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 02:07:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:18,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:07:18,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:18,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:18,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682586200] [2021-11-23 02:07:18,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682586200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:18,227 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:18,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:07:18,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432561150] [2021-11-23 02:07:18,227 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:18,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:18,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:18,228 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:07:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:18,306 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-11-23 02:07:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-23 02:07:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:18,309 INFO L225 Difference]: With dead ends: 158 [2021-11-23 02:07:18,309 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 02:07:18,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:18,310 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 58 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:18,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 412 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 02:07:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 98. [2021-11-23 02:07:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 85 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:07:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2021-11-23 02:07:18,316 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 26 [2021-11-23 02:07:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:18,317 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2021-11-23 02:07:18,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:07:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2021-11-23 02:07:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:07:18,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:18,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:18,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:18,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:18,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:07:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1178413680, now seen corresponding path program 1 times [2021-11-23 02:07:18,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:18,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868591271] [2021-11-23 02:07:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:18,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:18,533 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:18,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 02:07:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:18,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:07:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:07:18,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:19,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868591271] [2021-11-23 02:07:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868591271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628044214] [2021-11-23 02:07:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:07:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:07:19,184 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:07:19,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 02:07:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:07:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:19,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628044214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991679171] [2021-11-23 02:07:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:19,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:19,449 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:19,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 02:07:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:07:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:19,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:07:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991679171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:19,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:07:19,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2021-11-23 02:07:19,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119786618] [2021-11-23 02:07:19,659 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:19,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:07:19,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:07:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:07:19,661 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 02:07:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:19,757 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2021-11-23 02:07:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:07:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 26 [2021-11-23 02:07:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:19,759 INFO L225 Difference]: With dead ends: 138 [2021-11-23 02:07:19,760 INFO L226 Difference]: Without dead ends: 138 [2021-11-23 02:07:19,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:07:19,761 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 60 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:19,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 425 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2021-11-23 02:07:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-23 02:07:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 100. [2021-11-23 02:07:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.4375) internal successors, (92), 87 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:07:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-11-23 02:07:19,766 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 26 [2021-11-23 02:07:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-11-23 02:07:19,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 02:07:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-11-23 02:07:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:07:19,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:19,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:19,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:19,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-23 02:07:20,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:20,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:07:20,383 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:07:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 428272563, now seen corresponding path program 1 times [2021-11-23 02:07:20,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:20,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909123836] [2021-11-23 02:07:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:20,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:20,385 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 02:07:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:07:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:20,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:07:20,647 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:07:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:07:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:20,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:07:20,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909123836] [2021-11-23 02:07:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909123836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:20,899 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:20,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 7 [2021-11-23 02:07:20,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302115948] [2021-11-23 02:07:20,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:07:20,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:07:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:07:20,901 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:07:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:20,991 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-23 02:07:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:07:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2021-11-23 02:07:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:20,993 INFO L225 Difference]: With dead ends: 115 [2021-11-23 02:07:20,993 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 02:07:20,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:07:20,994 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 53 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:20,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 207 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2021-11-23 02:07:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 02:07:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2021-11-23 02:07:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.421875) internal successors, (91), 86 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:07:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-11-23 02:07:20,999 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 27 [2021-11-23 02:07:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:20,999 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-11-23 02:07:21,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:07:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-11-23 02:07:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:07:21,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:21,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:21,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:21,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:21,201 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:07:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash 428272564, now seen corresponding path program 1 times [2021-11-23 02:07:21,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:21,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443529502] [2021-11-23 02:07:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:21,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:21,203 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:21,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 02:07:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:07:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:21,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:07:21,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:07:23,628 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:07:23,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:07:23,647 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:07:23,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 02:07:23,833 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:07:23,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-23 02:07:23,846 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:07:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:07:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:07:23,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:32,488 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_29| (_ BitVec 32)) (|v_ldv_malloc_#res.base_277| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_276| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_276|))))) (or (not (bvule |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9|))) (exists ((v_ldv_malloc_~size_256 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_276| v_ldv_malloc_~size_256) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_29|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_277|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9|) (select (store |c_#length| |v_ldv_malloc_#res.base_277| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_29|))) (bvule |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_9|))))) is different from true [2021-11-23 02:07:33,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:07:33,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-23 02:07:50,075 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 27 treesize of output 25 [2021-11-23 02:07:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:07:50,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443529502] [2021-11-23 02:07:50,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443529502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635616775] [2021-11-23 02:07:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:50,216 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:07:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:07:50,223 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:07:50,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 02:07:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:50,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:07:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:07:50,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:07:50,593 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:07:50,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 02:07:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 02:07:50,852 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:07:50,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-23 02:07:50,866 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:07:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:07:50,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:25,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:08:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-23 02:09:16,718 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 27 treesize of output 25 [2021-11-23 02:09:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:16,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635616775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448596513] [2021-11-23 02:09:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:16,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:16,737 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:16,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 02:09:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:09:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:25,781 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:09:25,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-23 02:09:25,798 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:09:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-23 02:09:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:28,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:01,233 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_301| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_36| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_276| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_276|))))) (or (not (bvule |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17|))) (exists ((v_ldv_malloc_~size_256 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_276| v_ldv_malloc_~size_256) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_36|))))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17|) (select (store |c_#length| |v_ldv_malloc_#res.base_301| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_36|))) (bvule |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17| (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_17|))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_301|)))))) is different from true [2021-11-23 02:10:02,117 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 52 [2021-11-23 02:10:02,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:10:02,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-23 02:10:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:10:07,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448596513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:07,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:07,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11, 11, 9, 9] total 36 [2021-11-23 02:10:07,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114654952] [2021-11-23 02:10:07,217 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:07,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 02:10:07,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 02:10:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1007, Unknown=65, NotChecked=134, Total=1332 [2021-11-23 02:10:07,219 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 32 states have internal predecessors, (71), 6 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-23 02:11:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:01,993 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-11-23 02:11:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:11:01,994 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 32 states have internal predecessors, (71), 6 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) Word has length 27 [2021-11-23 02:11:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:01,995 INFO L225 Difference]: With dead ends: 117 [2021-11-23 02:11:01,996 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 02:11:01,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 203.0s TimeCoverageRelationStatistics Valid=211, Invalid=1530, Unknown=73, NotChecked=166, Total=1980 [2021-11-23 02:11:01,998 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 173 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:01,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1091 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 314 Invalid, 0 Unknown, 588 Unchecked, 1.0s Time] [2021-11-23 02:11:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 02:11:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-11-23 02:11:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.390625) internal successors, (89), 84 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:11:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-11-23 02:11:02,004 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 27 [2021-11-23 02:11:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:02,005 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-11-23 02:11:02,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 32 states have internal predecessors, (71), 6 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-23 02:11:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-11-23 02:11:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:11:02,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:02,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:02,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:02,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:02,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:02,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:11:02,613 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:11:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2123881454, now seen corresponding path program 1 times [2021-11-23 02:11:02,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:11:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011200843] [2021-11-23 02:11:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:02,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:11:02,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:11:02,614 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:11:02,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 02:11:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:11:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:02,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:02,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:03,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:11:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011200843] [2021-11-23 02:11:03,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011200843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715326280] [2021-11-23 02:11:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:03,002 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:11:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:11:03,003 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:11:03,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 02:11:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:11:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:03,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:03,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715326280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807139837] [2021-11-23 02:11:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:03,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:03,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:03,427 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:03,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 02:11:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:11:03,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:03,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:03,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807139837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:03,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:11:03,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2021-11-23 02:11:03,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673781338] [2021-11-23 02:11:03,811 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:11:03,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:11:03,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:11:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:11:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:03,813 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:11:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:04,321 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-11-23 02:11:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:11:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-11-23 02:11:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:04,323 INFO L225 Difference]: With dead ends: 136 [2021-11-23 02:11:04,323 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 02:11:04,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 137 SyntacticMatches, 14 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:04,324 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 46 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:04,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 427 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2021-11-23 02:11:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 02:11:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2021-11-23 02:11:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 85 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:11:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2021-11-23 02:11:04,330 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 27 [2021-11-23 02:11:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:04,330 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2021-11-23 02:11:04,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:11:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2021-11-23 02:11:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:11:04,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:04,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:04,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:04,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:04,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-23 02:11:04,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:04,941 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:11:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash -746927052, now seen corresponding path program 1 times [2021-11-23 02:11:04,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:11:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161204073] [2021-11-23 02:11:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:04,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:11:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:11:04,942 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:11:04,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 02:11:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:11:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:11:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:05,456 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 02:11:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2021-11-23 02:11:05,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:11:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2021-11-23 02:11:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:11:05,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:06,374 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-23 02:11:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2021-11-23 02:11:10,868 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-23 02:11:10,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 101 [2021-11-23 02:11:13,026 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_345| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_21| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_14| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_26| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_26|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_14| |v_ldv_malloc_#res.base_345|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_21|))) (or (= .cse0 |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_26|) (= .cse0 |v_ldv_malloc_#res.base_345|) (exists ((|v_ldv_malloc_#res.base_344| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_26| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_26|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_14| |v_ldv_malloc_#res.base_344|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_21|) |v_ldv_malloc_#res.base_344|)))))) is different from false [2021-11-23 02:11:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:11:13,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:11:13,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161204073] [2021-11-23 02:11:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161204073] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:13,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2021-11-23 02:11:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998508205] [2021-11-23 02:11:13,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:13,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:11:13,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:11:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:11:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=398, Unknown=2, NotChecked=0, Total=462 [2021-11-23 02:11:13,130 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:11:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:16,387 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-11-23 02:11:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:11:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-23 02:11:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:16,388 INFO L225 Difference]: With dead ends: 108 [2021-11-23 02:11:16,388 INFO L226 Difference]: Without dead ends: 108 [2021-11-23 02:11:16,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=93, Invalid=606, Unknown=3, NotChecked=0, Total=702 [2021-11-23 02:11:16,389 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 24 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 460 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 216 Invalid, 0 Unknown, 101 Unchecked, 0.7s Time] [2021-11-23 02:11:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-23 02:11:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-11-23 02:11:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 90 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:11:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2021-11-23 02:11:16,395 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 29 [2021-11-23 02:11:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:16,395 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2021-11-23 02:11:16,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:11:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2021-11-23 02:11:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:11:16,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:16,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:16,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:16,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:11:16,610 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:11:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -746927051, now seen corresponding path program 1 times [2021-11-23 02:11:16,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:11:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585712446] [2021-11-23 02:11:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:16,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:11:16,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:11:16,612 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:11:16,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 02:11:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:11:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:16,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:16,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:11:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 02:11:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:11:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:11:17,332 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:11:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-23 02:11:17,367 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:11:17,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2021-11-23 02:11:17,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 27 [2021-11-23 02:11:17,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 16 [2021-11-23 02:11:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:17,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:18,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:11:18,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 74 [2021-11-23 02:11:21,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:11:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:22,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:11:22,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585712446] [2021-11-23 02:11:22,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585712446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:22,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1648572350] [2021-11-23 02:11:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:22,671 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:11:22,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:11:22,672 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:11:22,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 02:11:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:22,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 02:11:22,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:22,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:23,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:11:25,536 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:11:25,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-11-23 02:11:25,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:11:25,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:11:26,142 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:11:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-11-23 02:11:26,150 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 25 treesize of output 19 [2021-11-23 02:11:30,824 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:11:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2021-11-23 02:11:30,874 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 02:11:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-11-23 02:11:31,242 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:11:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 53 [2021-11-23 02:11:31,271 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:11:31,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 42 [2021-11-23 02:11:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 27 [2021-11-23 02:11:31,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 16 [2021-11-23 02:11:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:31,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:22,384 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_366| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_366|)))) (exists ((|v_ldv_malloc_#res.base_365| (_ BitVec 32))) (and (or (exists ((|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32))) (not (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32)))))) (exists ((|ULTIMATE.start_entry_point_~fe~1#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32)) (v_ldv_malloc_~size_339 (_ BitVec 32))) (not (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|) (_ bv4 32)) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_365| v_ldv_malloc_~size_339) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.base|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_365|))))))) (and (forall ((|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))) (forall ((ldv_malloc_~size (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~1#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|) (_ bv4 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_366| ldv_malloc_~size) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.base|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|))))))) is different from true [2021-11-23 02:12:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:12:53,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1648572350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:53,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645359854] [2021-11-23 02:12:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:53,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:53,783 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:53,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 02:12:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:12:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:12:53,962 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:12:53,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-23 02:12:54,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:12:54,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:12:54,298 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:12:54,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 59 [2021-11-23 02:12:54,328 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:12:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-11-23 02:12:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 27 [2021-11-23 02:12:54,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 16 [2021-11-23 02:12:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:54,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:12:54,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 74 [2021-11-23 02:12:57,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:12:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:12:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645359854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:57,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:12:57,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 17, 17, 14, 13] total 50 [2021-11-23 02:12:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551295839] [2021-11-23 02:12:57,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:12:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:12:57,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:12:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:12:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2243, Unknown=20, NotChecked=96, Total=2550 [2021-11-23 02:12:57,969 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 43 states have internal predecessors, (74), 8 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-23 02:13:50,822 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_44| (_ BitVec 32))) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_44|) (_ bv0 32)) (_ bv0 32)) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_44| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_44|) (_ bv0 32)))))) (= |c_old(#valid)| |c_#valid|) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (= |c_#length| |c_old(#length)|) (forall ((|v_ldv_malloc_#res.base_366| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_366|)))) (exists ((|v_ldv_malloc_#res.base_365| (_ BitVec 32))) (and (or (exists ((|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32))) (not (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32)))))) (exists ((|ULTIMATE.start_entry_point_~fe~1#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32)) (v_ldv_malloc_~size_339 (_ BitVec 32))) (not (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|) (_ bv4 32)) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_365| v_ldv_malloc_~size_339) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.base|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_365|))))))) (and (forall ((|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))) (forall ((ldv_malloc_~size (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~1#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|) (_ bv4 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_366| ldv_malloc_~size) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~cfg~1#1.base_BEFORE_CALL_30|) |v_ULTIMATE.start_entry_point_~cfg~1#1.offset_BEFORE_CALL_18| |ULTIMATE.start_entry_point_~fe~1#1.base|)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|)))))))) is different from false [2021-11-23 02:13:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:55,676 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-23 02:13:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:13:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 43 states have internal predecessors, (74), 8 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 29 [2021-11-23 02:13:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:55,678 INFO L225 Difference]: With dead ends: 106 [2021-11-23 02:13:55,678 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 02:13:55,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 145.1s TimeCoverageRelationStatistics Valid=244, Invalid=2695, Unknown=39, NotChecked=214, Total=3192 [2021-11-23 02:13:55,680 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 24 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:55,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1703 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 365 Invalid, 0 Unknown, 679 Unchecked, 1.3s Time] [2021-11-23 02:13:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 02:13:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-11-23 02:13:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 89 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:13:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-11-23 02:13:55,686 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 29 [2021-11-23 02:13:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:55,686 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-11-23 02:13:55,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 43 states have internal predecessors, (74), 8 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-23 02:13:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-11-23 02:13:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:13:55,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:55,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:55,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:55,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:56,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-23 02:13:56,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:13:56,288 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:13:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -943440557, now seen corresponding path program 1 times [2021-11-23 02:13:56,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:13:56,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814266150] [2021-11-23 02:13:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:56,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:13:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:13:56,291 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:13:56,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 02:13:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:13:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:13:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:13:56,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:13:56,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814266150] [2021-11-23 02:13:56,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814266150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:56,626 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:56,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:13:56,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818008607] [2021-11-23 02:13:56,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:56,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:13:56,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:13:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:13:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:13:56,627 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:13:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:56,690 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2021-11-23 02:13:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:13:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-11-23 02:13:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:56,692 INFO L225 Difference]: With dead ends: 105 [2021-11-23 02:13:56,692 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 02:13:56,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:13:56,693 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 10 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:56,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 328 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:13:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 02:13:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-11-23 02:13:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 83 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:13:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-23 02:13:56,700 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 29 [2021-11-23 02:13:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:56,700 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-23 02:13:56,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:13:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-23 02:13:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:13:56,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:56,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:56,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:56,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:13:56,916 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:13:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash 905940693, now seen corresponding path program 1 times [2021-11-23 02:13:56,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:13:56,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159958348] [2021-11-23 02:13:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:56,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:13:56,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:13:56,917 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:13:56,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 02:13:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:13:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:57,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:13:57,164 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:13:57,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-23 02:13:57,509 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 02:13:57,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-11-23 02:13:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:13:57,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:00,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159958348] [2021-11-23 02:14:00,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159958348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906126541] [2021-11-23 02:14:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:00,429 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:14:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:14:00,430 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:14:00,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-23 02:14:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:00,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:14:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:14:00,657 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:14:00,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 02:14:00,864 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:14:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-11-23 02:14:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:01,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:01,181 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 28 treesize of output 24 [2021-11-23 02:14:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:01,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906126541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:01,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085246037] [2021-11-23 02:14:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:01,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:01,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:01,442 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 02:14:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:14:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:01,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:14:01,583 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:14:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-23 02:14:03,738 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:14:03,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-11-23 02:14:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:03,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:06,062 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 28 treesize of output 24 [2021-11-23 02:14:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:06,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085246037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:06,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:14:06,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 10, 9] total 17 [2021-11-23 02:14:06,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638794443] [2021-11-23 02:14:06,297 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:14:06,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:14:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=253, Unknown=1, NotChecked=0, Total=306 [2021-11-23 02:14:06,299 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:14:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:13,162 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-11-23 02:14:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:14:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 30 [2021-11-23 02:14:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:13,164 INFO L225 Difference]: With dead ends: 101 [2021-11-23 02:14:13,164 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 02:14:13,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 31 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=63, Invalid=315, Unknown=2, NotChecked=0, Total=380 [2021-11-23 02:14:13,165 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 60 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:13,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 601 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 305 Invalid, 0 Unknown, 141 Unchecked, 0.7s Time] [2021-11-23 02:14:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 02:14:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-11-23 02:14:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 02:14:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-11-23 02:14:13,171 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 30 [2021-11-23 02:14:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:13,171 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-11-23 02:14:13,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:14:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-11-23 02:14:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:14:13,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:13,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:13,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:13,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:13,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:13,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:13,777 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:14:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1269350632, now seen corresponding path program 1 times [2021-11-23 02:14:13,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888288731] [2021-11-23 02:14:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:13,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:13,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:13,779 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:13,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 02:14:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:13,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:14:13,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:14:18,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:23,960 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_66| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19| (Array (_ BitVec 32) (_ BitVec 1)))) (or (= (store (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_66| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19|) (exists ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156|)))) (not (= (store (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_66| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19|)))))) is different from false [2021-11-23 02:14:32,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_20| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret43#1.base_130| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_130| (_ bv1 1)))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_130|)))))))) (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_20| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret43#1.base_130| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156|)))))))))))) (= (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ bv0 1)) |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_20|) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156|))))))) is different from false [2021-11-23 02:14:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:14:33,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888288731] [2021-11-23 02:14:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888288731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1603034397] [2021-11-23 02:14:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:33,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:14:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:14:33,387 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:14:33,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-23 02:14:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:33,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:14:33,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:14:47,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:52,282 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 13 treesize of output 11 [2021-11-23 02:14:56,433 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)))) (or (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70|))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70| (_ bv0 32)))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_161| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_161| (_ bv0 1)))) (and (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70|)))))) (_ bv1 1))) (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70| (_ bv0 32))) (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25| (store .cse1 |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_161|)))))))) (= (store .cse0 |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_70| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25|)))) is different from false [2021-11-23 02:15:18,947 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_455| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_26| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_#t~ret44#1.base_161| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_455| (_ bv1 1)))) (or (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_26| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_161| (_ bv0 1)) |v_ldv_malloc_#res.base_455| (_ bv0 1))) (= |v_ldv_malloc_#res.base_455| (_ bv0 32)) (exists ((|v_ULTIMATE.start_entry_point_#t~ret43#1.base_135| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret44#1.base_161| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_135| (_ bv1 1)))) (and (not (= |v_ULTIMATE.start_entry_point_#t~ret43#1.base_135| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_161|))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_135|)))) (not (= (store (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_161| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret43#1.base_135| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_26|))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_455|))))))))) (not (= (_ bv0 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_161|)))))))) is different from false [2021-11-23 02:15:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-23 02:15:19,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1603034397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291118990] [2021-11-23 02:15:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:19,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:19,248 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:19,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 02:15:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:19,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:15:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:15:19,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:28,183 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_31| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_74| (_ BitVec 32))) (or (= (store (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_74| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_31|) (exists ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156|))))) (not (= (store (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_74| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_31|)))))) is different from false [2021-11-23 02:15:31,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_32| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ BitVec 32))) (or (= (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ bv0 1)) |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_32|) (exists ((|v_ULTIMATE.start_entry_point_#t~ret43#1.base_130| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_130| (_ bv1 1)))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret43#1.base_130|)))))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156|))))) (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_32| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret43#1.base_130| (_ bv0 1))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_156|))))))) is different from false [2021-11-23 02:15:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:15:35,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291118990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:35,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:15:35,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12, 15, 10, 13] total 47 [2021-11-23 02:15:35,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123013167] [2021-11-23 02:15:35,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:35,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 02:15:35,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:15:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 02:15:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1455, Unknown=95, NotChecked=510, Total=2256 [2021-11-23 02:15:35,191 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 48 states, 42 states have (on average 2.142857142857143) internal successors, (90), 40 states have internal predecessors, (90), 12 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:15:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:39,794 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-11-23 02:15:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:15:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.142857142857143) internal successors, (90), 40 states have internal predecessors, (90), 12 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 32 [2021-11-23 02:15:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:39,798 INFO L225 Difference]: With dead ends: 101 [2021-11-23 02:15:39,798 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:15:39,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=257, Invalid=1926, Unknown=97, NotChecked=582, Total=2862 [2021-11-23 02:15:39,801 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 20 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:39,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1305 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 405 Invalid, 0 Unknown, 654 Unchecked, 1.2s Time] [2021-11-23 02:15:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:15:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 02:15:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:15:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-23 02:15:39,806 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 32 [2021-11-23 02:15:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:39,806 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-23 02:15:39,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.142857142857143) internal successors, (90), 40 states have internal predecessors, (90), 12 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:15:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-23 02:15:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:15:39,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:39,807 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:39,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:40,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:40,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:15:40,408 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 26 more)] === [2021-11-23 02:15:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash 411440938, now seen corresponding path program 1 times [2021-11-23 02:15:40,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:15:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851948081] [2021-11-23 02:15:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:40,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:15:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:15:40,410 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:15:40,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8334292-e644-48a7-bbaa-848b9a9e70b2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 02:15:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 02:15:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:40,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:15:40,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:15:40,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 02:15:40,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:15:40,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:15:42,849 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_76| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_76| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_76|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_34|)))) is different from true [2021-11-23 02:15:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:15:47,228 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:15:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 50 [2021-11-23 02:15:47,261 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 02:15:47,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2021-11-23 02:15:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 38 [2021-11-23 02:15:47,642 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:15:47,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-23 02:15:47,962 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:15:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 42 [2021-11-23 02:15:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-11-23 02:15:48,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:16,928 INFO L354 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2021-11-23 02:17:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 190 [2021-11-23 02:17:18,959 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_entry_point_~fe~1#1.offset| (_ BitVec 32)) (|v_ldv_malloc_#res.base_474| (_ BitVec 32))) (= |v_ldv_malloc_#res.base_474| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ldv_malloc_#res.base_474|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |ULTIMATE.start_entry_point_~fe~1#1.offset|)) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) is different from false