./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan --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 37e69ef296564883bb35e755c16874865eb9c81e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan --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 37e69ef296564883bb35e755c16874865eb9c81e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [1145469632] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [697441506] failed with TRACE_FEASIBLE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:35:28,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:35:28,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:35:28,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:35:28,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:35:28,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:35:28,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:35:28,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:35:28,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:35:28,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:35:28,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:35:28,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:35:28,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:35:28,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:35:28,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:35:28,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:35:28,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:35:28,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:35:28,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:35:28,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:35:28,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:35:28,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:35:28,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:35:28,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:35:28,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:35:28,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:35:28,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:35:28,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:35:28,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:35:28,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:35:28,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:35:28,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:35:28,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:35:28,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:35:28,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:35:28,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:35:28,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:35:28,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:35:28,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:35:28,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:35:28,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:35:28,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 17:35:28,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:35:28,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:35:28,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:35:28,425 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:35:28,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:35:28,425 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:35:28,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:35:28,425 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:35:28,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:35:28,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:35:28,426 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:35:28,426 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:35:28,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:35:28,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:35:28,426 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:35:28,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:35:28,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:35:28,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:35:28,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:35:28,427 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:35:28,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:35:28,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:35:28,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:35:28,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:35:28,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:35:28,429 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-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37e69ef296564883bb35e755c16874865eb9c81e [2020-12-09 17:35:28,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:35:28,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:35:28,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:35:28,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:35:28,618 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:35:28,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2020-12-09 17:35:28,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/288f3e552/9bca5a4fe1774ff1850dd80f92f36c88/FLAGe16584c8d [2020-12-09 17:35:29,086 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:35:29,086 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2020-12-09 17:35:29,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/288f3e552/9bca5a4fe1774ff1850dd80f92f36c88/FLAGe16584c8d [2020-12-09 17:35:29,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/288f3e552/9bca5a4fe1774ff1850dd80f92f36c88 [2020-12-09 17:35:29,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:35:29,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:35:29,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:35:29,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:35:29,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:35:29,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6037ab9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29, skipping insertion in model container [2020-12-09 17:35:29,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:35:29,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:35:29,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:35:29,443 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:35:29,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:35:29,543 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:35:29,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29 WrapperNode [2020-12-09 17:35:29,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:35:29,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:35:29,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:35:29,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:35:29,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:35:29,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:35:29,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:35:29,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:35:29,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... [2020-12-09 17:35:29,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:35:29,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:35:29,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:35:29,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:35:29,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:35:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:35:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 17:35:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 17:35:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:35:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 17:35:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:35:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 17:35:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:35:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:35:29,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:35:30,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:35:30,269 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-09 17:35:30,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:35:30 BoogieIcfgContainer [2020-12-09 17:35:30,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:35:30,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:35:30,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:35:30,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:35:30,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:35:29" (1/3) ... [2020-12-09 17:35:30,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2426afaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:35:30, skipping insertion in model container [2020-12-09 17:35:30,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:29" (2/3) ... [2020-12-09 17:35:30,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2426afaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:35:30, skipping insertion in model container [2020-12-09 17:35:30,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:35:30" (3/3) ... [2020-12-09 17:35:30,279 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2020-12-09 17:35:30,291 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:35:30,294 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 57 error locations. [2020-12-09 17:35:30,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2020-12-09 17:35:30,315 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:35:30,315 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:35:30,315 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:35:30,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:35:30,315 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:35:30,315 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:35:30,315 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:35:30,315 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:35:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-12-09 17:35:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:35:30,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:30,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:35:30,332 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash 9960713, now seen corresponding path program 1 times [2020-12-09 17:35:30,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:30,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319011969] [2020-12-09 17:35:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:30,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319011969] [2020-12-09 17:35:30,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:30,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:30,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175933807] [2020-12-09 17:35:30,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:35:30,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:35:30,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:35:30,456 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 2 states. [2020-12-09 17:35:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:30,468 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-12-09 17:35:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:35:30,469 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 17:35:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:30,476 INFO L225 Difference]: With dead ends: 117 [2020-12-09 17:35:30,476 INFO L226 Difference]: Without dead ends: 115 [2020-12-09 17:35:30,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:35:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-09 17:35:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-09 17:35:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-09 17:35:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-12-09 17:35:30,504 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 4 [2020-12-09 17:35:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:30,504 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-12-09 17:35:30,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:35:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-12-09 17:35:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:35:30,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:30,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:35:30,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:35:30,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:30,506 INFO L82 PathProgramCache]: Analyzing trace with hash 310686443, now seen corresponding path program 1 times [2020-12-09 17:35:30,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:30,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078717288] [2020-12-09 17:35:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078717288] [2020-12-09 17:35:30,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:30,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:35:30,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654074703] [2020-12-09 17:35:30,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:35:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:35:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:30,553 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 3 states. [2020-12-09 17:35:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:30,712 INFO L93 Difference]: Finished difference Result 223 states and 242 transitions. [2020-12-09 17:35:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:35:30,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 17:35:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:30,716 INFO L225 Difference]: With dead ends: 223 [2020-12-09 17:35:30,716 INFO L226 Difference]: Without dead ends: 223 [2020-12-09 17:35:30,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-09 17:35:30,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 146. [2020-12-09 17:35:30,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-09 17:35:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2020-12-09 17:35:30,731 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 5 [2020-12-09 17:35:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:30,731 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2020-12-09 17:35:30,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:35:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2020-12-09 17:35:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:35:30,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:30,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:35:30,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:35:30,732 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 310686444, now seen corresponding path program 1 times [2020-12-09 17:35:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:30,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434673883] [2020-12-09 17:35:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:30,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434673883] [2020-12-09 17:35:30,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:30,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104688288] [2020-12-09 17:35:30,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:30,832 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand 4 states. [2020-12-09 17:35:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:30,964 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2020-12-09 17:35:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:35:30,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 17:35:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:30,966 INFO L225 Difference]: With dead ends: 242 [2020-12-09 17:35:30,966 INFO L226 Difference]: Without dead ends: 242 [2020-12-09 17:35:30,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-09 17:35:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 196. [2020-12-09 17:35:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-09 17:35:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 285 transitions. [2020-12-09 17:35:30,977 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 285 transitions. Word has length 5 [2020-12-09 17:35:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:30,977 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 285 transitions. [2020-12-09 17:35:30,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 285 transitions. [2020-12-09 17:35:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:35:30,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:30,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:35:30,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:35:30,978 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1041393234, now seen corresponding path program 1 times [2020-12-09 17:35:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:30,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585267925] [2020-12-09 17:35:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:31,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585267925] [2020-12-09 17:35:31,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:31,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:31,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770907852] [2020-12-09 17:35:31,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:31,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:31,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:31,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:31,009 INFO L87 Difference]: Start difference. First operand 196 states and 285 transitions. Second operand 4 states. [2020-12-09 17:35:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:31,206 INFO L93 Difference]: Finished difference Result 379 states and 447 transitions. [2020-12-09 17:35:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:31,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 17:35:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:31,208 INFO L225 Difference]: With dead ends: 379 [2020-12-09 17:35:31,208 INFO L226 Difference]: Without dead ends: 379 [2020-12-09 17:35:31,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-09 17:35:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 191. [2020-12-09 17:35:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-09 17:35:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 274 transitions. [2020-12-09 17:35:31,217 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 274 transitions. Word has length 6 [2020-12-09 17:35:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:31,217 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 274 transitions. [2020-12-09 17:35:31,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 274 transitions. [2020-12-09 17:35:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:35:31,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:31,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:35:31,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:35:31,218 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1041393235, now seen corresponding path program 1 times [2020-12-09 17:35:31,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:31,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392244854] [2020-12-09 17:35:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:31,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392244854] [2020-12-09 17:35:31,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:31,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841406103] [2020-12-09 17:35:31,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:31,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:31,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:31,272 INFO L87 Difference]: Start difference. First operand 191 states and 274 transitions. Second operand 4 states. [2020-12-09 17:35:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:31,442 INFO L93 Difference]: Finished difference Result 367 states and 451 transitions. [2020-12-09 17:35:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:31,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 17:35:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:31,444 INFO L225 Difference]: With dead ends: 367 [2020-12-09 17:35:31,444 INFO L226 Difference]: Without dead ends: 367 [2020-12-09 17:35:31,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-09 17:35:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 221. [2020-12-09 17:35:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-09 17:35:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2020-12-09 17:35:31,454 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 6 [2020-12-09 17:35:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:31,454 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2020-12-09 17:35:31,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2020-12-09 17:35:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:35:31,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:31,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:31,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 17:35:31,455 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995839, now seen corresponding path program 1 times [2020-12-09 17:35:31,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:31,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890838565] [2020-12-09 17:35:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890838565] [2020-12-09 17:35:31,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:31,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:35:31,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452529423] [2020-12-09 17:35:31,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:35:31,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:35:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:31,483 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand 3 states. [2020-12-09 17:35:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:31,566 INFO L93 Difference]: Finished difference Result 276 states and 379 transitions. [2020-12-09 17:35:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:35:31,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 17:35:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:31,568 INFO L225 Difference]: With dead ends: 276 [2020-12-09 17:35:31,568 INFO L226 Difference]: Without dead ends: 275 [2020-12-09 17:35:31,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-09 17:35:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 222. [2020-12-09 17:35:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-09 17:35:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2020-12-09 17:35:31,575 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 7 [2020-12-09 17:35:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:31,575 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2020-12-09 17:35:31,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:35:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2020-12-09 17:35:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:35:31,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:31,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:31,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 17:35:31,576 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2077997712, now seen corresponding path program 1 times [2020-12-09 17:35:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:31,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654178813] [2020-12-09 17:35:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654178813] [2020-12-09 17:35:31,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:31,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:31,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390043043] [2020-12-09 17:35:31,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:35:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:31,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:35:31,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:31,600 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand 3 states. [2020-12-09 17:35:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:31,609 INFO L93 Difference]: Finished difference Result 266 states and 331 transitions. [2020-12-09 17:35:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:35:31,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 17:35:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:31,611 INFO L225 Difference]: With dead ends: 266 [2020-12-09 17:35:31,611 INFO L226 Difference]: Without dead ends: 263 [2020-12-09 17:35:31,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-09 17:35:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 220. [2020-12-09 17:35:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 17:35:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 325 transitions. [2020-12-09 17:35:31,618 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 325 transitions. Word has length 7 [2020-12-09 17:35:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:31,618 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 325 transitions. [2020-12-09 17:35:31,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:35:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 325 transitions. [2020-12-09 17:35:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:35:31,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:31,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:31,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 17:35:31,619 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash 43206824, now seen corresponding path program 1 times [2020-12-09 17:35:31,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:31,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166325877] [2020-12-09 17:35:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:31,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166325877] [2020-12-09 17:35:31,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:31,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:31,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774471730] [2020-12-09 17:35:31,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:31,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:31,649 INFO L87 Difference]: Start difference. First operand 220 states and 325 transitions. Second operand 4 states. [2020-12-09 17:35:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:31,857 INFO L93 Difference]: Finished difference Result 498 states and 669 transitions. [2020-12-09 17:35:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:31,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:35:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:31,860 INFO L225 Difference]: With dead ends: 498 [2020-12-09 17:35:31,860 INFO L226 Difference]: Without dead ends: 498 [2020-12-09 17:35:31,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-09 17:35:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 218. [2020-12-09 17:35:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-09 17:35:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 317 transitions. [2020-12-09 17:35:31,865 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 317 transitions. Word has length 8 [2020-12-09 17:35:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:31,865 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 317 transitions. [2020-12-09 17:35:31,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 317 transitions. [2020-12-09 17:35:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:35:31,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:31,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:31,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 17:35:31,866 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash 43206825, now seen corresponding path program 1 times [2020-12-09 17:35:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:31,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054735905] [2020-12-09 17:35:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:31,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054735905] [2020-12-09 17:35:31,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:31,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:31,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061457603] [2020-12-09 17:35:31,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:31,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:31,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:31,908 INFO L87 Difference]: Start difference. First operand 218 states and 317 transitions. Second operand 4 states. [2020-12-09 17:35:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:32,044 INFO L93 Difference]: Finished difference Result 254 states and 323 transitions. [2020-12-09 17:35:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:35:32,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:35:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:32,045 INFO L225 Difference]: With dead ends: 254 [2020-12-09 17:35:32,045 INFO L226 Difference]: Without dead ends: 254 [2020-12-09 17:35:32,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-09 17:35:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 218. [2020-12-09 17:35:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-09 17:35:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 312 transitions. [2020-12-09 17:35:32,050 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 312 transitions. Word has length 8 [2020-12-09 17:35:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:32,050 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 312 transitions. [2020-12-09 17:35:32,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 312 transitions. [2020-12-09 17:35:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:35:32,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:32,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:32,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 17:35:32,051 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 51767740, now seen corresponding path program 1 times [2020-12-09 17:35:32,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:32,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026030061] [2020-12-09 17:35:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:32,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026030061] [2020-12-09 17:35:32,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:32,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:32,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527688536] [2020-12-09 17:35:32,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:35:32,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:35:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:32,070 INFO L87 Difference]: Start difference. First operand 218 states and 312 transitions. Second operand 3 states. [2020-12-09 17:35:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:32,156 INFO L93 Difference]: Finished difference Result 289 states and 380 transitions. [2020-12-09 17:35:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:35:32,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 17:35:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:32,158 INFO L225 Difference]: With dead ends: 289 [2020-12-09 17:35:32,158 INFO L226 Difference]: Without dead ends: 289 [2020-12-09 17:35:32,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-09 17:35:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 215. [2020-12-09 17:35:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-09 17:35:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 300 transitions. [2020-12-09 17:35:32,164 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 300 transitions. Word has length 8 [2020-12-09 17:35:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:32,164 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 300 transitions. [2020-12-09 17:35:32,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:35:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 300 transitions. [2020-12-09 17:35:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:35:32,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:32,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:32,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 17:35:32,165 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash 51767741, now seen corresponding path program 1 times [2020-12-09 17:35:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:32,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644991205] [2020-12-09 17:35:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644991205] [2020-12-09 17:35:32,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:32,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:32,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005662061] [2020-12-09 17:35:32,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:32,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:32,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:32,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:32,220 INFO L87 Difference]: Start difference. First operand 215 states and 300 transitions. Second operand 5 states. [2020-12-09 17:35:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:32,324 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2020-12-09 17:35:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:32,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 17:35:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:32,325 INFO L225 Difference]: With dead ends: 241 [2020-12-09 17:35:32,325 INFO L226 Difference]: Without dead ends: 241 [2020-12-09 17:35:32,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-09 17:35:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2020-12-09 17:35:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-09 17:35:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 292 transitions. [2020-12-09 17:35:32,329 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 292 transitions. Word has length 8 [2020-12-09 17:35:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:32,329 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 292 transitions. [2020-12-09 17:35:32,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 292 transitions. [2020-12-09 17:35:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:35:32,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:32,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:32,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 17:35:32,330 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1604799980, now seen corresponding path program 1 times [2020-12-09 17:35:32,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:32,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248894080] [2020-12-09 17:35:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:32,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248894080] [2020-12-09 17:35:32,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:32,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329151021] [2020-12-09 17:35:32,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:32,379 INFO L87 Difference]: Start difference. First operand 213 states and 292 transitions. Second operand 5 states. [2020-12-09 17:35:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:32,486 INFO L93 Difference]: Finished difference Result 240 states and 289 transitions. [2020-12-09 17:35:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:32,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 17:35:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:32,488 INFO L225 Difference]: With dead ends: 240 [2020-12-09 17:35:32,488 INFO L226 Difference]: Without dead ends: 240 [2020-12-09 17:35:32,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-09 17:35:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2020-12-09 17:35:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-09 17:35:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 288 transitions. [2020-12-09 17:35:32,494 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 288 transitions. Word has length 9 [2020-12-09 17:35:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:32,494 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 288 transitions. [2020-12-09 17:35:32,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 288 transitions. [2020-12-09 17:35:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:35:32,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:32,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:32,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 17:35:32,495 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1977878891, now seen corresponding path program 1 times [2020-12-09 17:35:32,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:32,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45012158] [2020-12-09 17:35:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:32,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45012158] [2020-12-09 17:35:32,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 17:35:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390677301] [2020-12-09 17:35:32,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:35:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:35:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:32,660 INFO L87 Difference]: Start difference. First operand 212 states and 288 transitions. Second operand 7 states. [2020-12-09 17:35:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:32,941 INFO L93 Difference]: Finished difference Result 286 states and 373 transitions. [2020-12-09 17:35:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:35:32,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 17:35:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:32,943 INFO L225 Difference]: With dead ends: 286 [2020-12-09 17:35:32,943 INFO L226 Difference]: Without dead ends: 285 [2020-12-09 17:35:32,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:35:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-09 17:35:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 242. [2020-12-09 17:35:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-09 17:35:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 337 transitions. [2020-12-09 17:35:32,949 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 337 transitions. Word has length 12 [2020-12-09 17:35:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:32,949 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 337 transitions. [2020-12-09 17:35:32,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:35:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 337 transitions. [2020-12-09 17:35:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:35:32,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:32,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:32,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 17:35:32,950 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1315465542, now seen corresponding path program 1 times [2020-12-09 17:35:32,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:32,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18241477] [2020-12-09 17:35:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:33,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18241477] [2020-12-09 17:35:33,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:33,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:33,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968003606] [2020-12-09 17:35:33,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:33,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:33,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:33,025 INFO L87 Difference]: Start difference. First operand 242 states and 337 transitions. Second operand 5 states. [2020-12-09 17:35:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:33,145 INFO L93 Difference]: Finished difference Result 431 states and 556 transitions. [2020-12-09 17:35:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:35:33,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 17:35:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:33,148 INFO L225 Difference]: With dead ends: 431 [2020-12-09 17:35:33,148 INFO L226 Difference]: Without dead ends: 431 [2020-12-09 17:35:33,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-12-09 17:35:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 273. [2020-12-09 17:35:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-09 17:35:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 386 transitions. [2020-12-09 17:35:33,155 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 386 transitions. Word has length 12 [2020-12-09 17:35:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:33,155 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 386 transitions. [2020-12-09 17:35:33,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 386 transitions. [2020-12-09 17:35:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:35:33,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:33,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:33,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 17:35:33,156 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1184332888, now seen corresponding path program 1 times [2020-12-09 17:35:33,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:33,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560598176] [2020-12-09 17:35:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:33,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560598176] [2020-12-09 17:35:33,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:33,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:33,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422972727] [2020-12-09 17:35:33,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:33,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:33,184 INFO L87 Difference]: Start difference. First operand 273 states and 386 transitions. Second operand 5 states. [2020-12-09 17:35:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:33,301 INFO L93 Difference]: Finished difference Result 440 states and 581 transitions. [2020-12-09 17:35:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:35:33,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 17:35:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:33,303 INFO L225 Difference]: With dead ends: 440 [2020-12-09 17:35:33,303 INFO L226 Difference]: Without dead ends: 440 [2020-12-09 17:35:33,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-12-09 17:35:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 278. [2020-12-09 17:35:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-09 17:35:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 388 transitions. [2020-12-09 17:35:33,310 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 388 transitions. Word has length 13 [2020-12-09 17:35:33,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:33,310 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 388 transitions. [2020-12-09 17:35:33,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:33,310 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 388 transitions. [2020-12-09 17:35:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:35:33,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:33,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:33,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-09 17:35:33,311 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1184332887, now seen corresponding path program 1 times [2020-12-09 17:35:33,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:33,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641628715] [2020-12-09 17:35:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641628715] [2020-12-09 17:35:33,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:33,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:33,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027442439] [2020-12-09 17:35:33,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:33,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:33,355 INFO L87 Difference]: Start difference. First operand 278 states and 388 transitions. Second operand 4 states. [2020-12-09 17:35:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:33,459 INFO L93 Difference]: Finished difference Result 309 states and 391 transitions. [2020-12-09 17:35:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:35:33,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 17:35:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:33,461 INFO L225 Difference]: With dead ends: 309 [2020-12-09 17:35:33,461 INFO L226 Difference]: Without dead ends: 309 [2020-12-09 17:35:33,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-09 17:35:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 278. [2020-12-09 17:35:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-09 17:35:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 377 transitions. [2020-12-09 17:35:33,466 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 377 transitions. Word has length 13 [2020-12-09 17:35:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:33,466 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 377 transitions. [2020-12-09 17:35:33,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 377 transitions. [2020-12-09 17:35:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 17:35:33,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:33,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:33,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-09 17:35:33,468 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 695415715, now seen corresponding path program 1 times [2020-12-09 17:35:33,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:33,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903545123] [2020-12-09 17:35:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:33,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903545123] [2020-12-09 17:35:33,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:33,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72709238] [2020-12-09 17:35:33,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:33,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:33,526 INFO L87 Difference]: Start difference. First operand 278 states and 377 transitions. Second operand 5 states. [2020-12-09 17:35:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:33,674 INFO L93 Difference]: Finished difference Result 462 states and 594 transitions. [2020-12-09 17:35:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:33,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-09 17:35:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:33,677 INFO L225 Difference]: With dead ends: 462 [2020-12-09 17:35:33,677 INFO L226 Difference]: Without dead ends: 462 [2020-12-09 17:35:33,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-09 17:35:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 275. [2020-12-09 17:35:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-09 17:35:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 372 transitions. [2020-12-09 17:35:33,686 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 372 transitions. Word has length 16 [2020-12-09 17:35:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:33,686 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 372 transitions. [2020-12-09 17:35:33,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 372 transitions. [2020-12-09 17:35:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 17:35:33,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:33,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:33,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-09 17:35:33,687 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash 82917039, now seen corresponding path program 1 times [2020-12-09 17:35:33,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:33,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800230049] [2020-12-09 17:35:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:33,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800230049] [2020-12-09 17:35:33,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:33,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:35:33,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531215300] [2020-12-09 17:35:33,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:33,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:33,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:33,754 INFO L87 Difference]: Start difference. First operand 275 states and 372 transitions. Second operand 5 states. [2020-12-09 17:35:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:33,865 INFO L93 Difference]: Finished difference Result 309 states and 398 transitions. [2020-12-09 17:35:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:35:33,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 17:35:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:33,868 INFO L225 Difference]: With dead ends: 309 [2020-12-09 17:35:33,868 INFO L226 Difference]: Without dead ends: 309 [2020-12-09 17:35:33,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-09 17:35:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2020-12-09 17:35:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-09 17:35:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 370 transitions. [2020-12-09 17:35:33,875 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 370 transitions. Word has length 17 [2020-12-09 17:35:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:33,875 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 370 transitions. [2020-12-09 17:35:33,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 370 transitions. [2020-12-09 17:35:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 17:35:33,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:33,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:33,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-09 17:35:33,876 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash 83053478, now seen corresponding path program 1 times [2020-12-09 17:35:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:33,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910789861] [2020-12-09 17:35:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:33,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910789861] [2020-12-09 17:35:33,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:33,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:35:33,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961473641] [2020-12-09 17:35:33,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:35:33,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:34,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:35:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:35:34,000 INFO L87 Difference]: Start difference. First operand 275 states and 370 transitions. Second operand 6 states. [2020-12-09 17:35:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:34,172 INFO L93 Difference]: Finished difference Result 301 states and 388 transitions. [2020-12-09 17:35:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:35:34,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-09 17:35:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:34,174 INFO L225 Difference]: With dead ends: 301 [2020-12-09 17:35:34,174 INFO L226 Difference]: Without dead ends: 301 [2020-12-09 17:35:34,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:35:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-09 17:35:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 275. [2020-12-09 17:35:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-09 17:35:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 368 transitions. [2020-12-09 17:35:34,180 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 368 transitions. Word has length 17 [2020-12-09 17:35:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:34,180 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 368 transitions. [2020-12-09 17:35:34,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:35:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 368 transitions. [2020-12-09 17:35:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:35:34,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:34,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:34,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-09 17:35:34,181 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1724538873, now seen corresponding path program 1 times [2020-12-09 17:35:34,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:34,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47002948] [2020-12-09 17:35:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:34,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47002948] [2020-12-09 17:35:34,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:34,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:35:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904158136] [2020-12-09 17:35:34,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:34,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:34,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:34,247 INFO L87 Difference]: Start difference. First operand 275 states and 368 transitions. Second operand 5 states. [2020-12-09 17:35:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:34,376 INFO L93 Difference]: Finished difference Result 340 states and 439 transitions. [2020-12-09 17:35:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:34,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-09 17:35:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:34,377 INFO L225 Difference]: With dead ends: 340 [2020-12-09 17:35:34,377 INFO L226 Difference]: Without dead ends: 340 [2020-12-09 17:35:34,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-12-09 17:35:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 304. [2020-12-09 17:35:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-09 17:35:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 407 transitions. [2020-12-09 17:35:34,382 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 407 transitions. Word has length 18 [2020-12-09 17:35:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:34,382 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 407 transitions. [2020-12-09 17:35:34,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 407 transitions. [2020-12-09 17:35:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 17:35:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:34,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:34,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-09 17:35:34,383 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash -714613047, now seen corresponding path program 1 times [2020-12-09 17:35:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:34,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551775486] [2020-12-09 17:35:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551775486] [2020-12-09 17:35:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158141756] [2020-12-09 17:35:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:35:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 17:35:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:35:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:34,711 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 14 treesize of output 12 [2020-12-09 17:35:34,713 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:34,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:34,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:35:34,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:36 [2020-12-09 17:35:34,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,891 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 17:35:34,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 17:35:34,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 17:35:34,944 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 17:35:34,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 17:35:34,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 17:35:34,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,981 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 17:35:34,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:34,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 17:35:34,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 17:35:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,027 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 49 [2020-12-09 17:35:35,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,052 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 50 [2020-12-09 17:35:35,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:35,056 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 17:35:35,057 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,081 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,081 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 50 [2020-12-09 17:35:35,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 17:35:35,085 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:35,090 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,101 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,102 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2020-12-09 17:35:35,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 17:35:35,105 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:35,109 INFO L547 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,133 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2020-12-09 17:35:35,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:35:35,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 17:35:35,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 17:35:35,139 INFO L547 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:35,144 INFO L547 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:35,149 INFO L547 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,273 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-09 17:35:35,274 INFO L625 ElimStorePlain]: treesize reduction 63, result has 78.1 percent of original size [2020-12-09 17:35:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-12-09 17:35:35,283 INFO L547 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,304 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,305 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 49 [2020-12-09 17:35:35,306 INFO L547 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,311 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 17:35:35,313 INFO L547 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:35:35,320 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2020-12-09 17:35:35,322 INFO L547 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2020-12-09 17:35:35,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:35:35,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 4 xjuncts. [2020-12-09 17:35:35,360 INFO L244 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:718, output treesize:109 [2020-12-09 17:35:35,407 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 6, 1] term [2020-12-09 17:35:35,408 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:35:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:35,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:35:35,484 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 3, 2, 1] term [2020-12-09 17:35:35,484 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:35:35,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 17:35:35,486 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-09 17:35:35,488 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 17:35:35,489 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 17:35:35,490 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 17:35:35,792 INFO L639 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-12-09 17:35:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493742839] [2020-12-09 17:35:35,999 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 17:35:35,999 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:35:36,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:35:36,008 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:35:36,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:35:36,333 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:35:36,531 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 93 [2020-12-09 17:35:36,866 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2020-12-09 17:35:37,275 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-12-09 17:35:37,626 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-12-09 17:35:38,231 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2020-12-09 17:35:38,428 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2020-12-09 17:35:38,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:35:38,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:35:38,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2020-12-09 17:35:38,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340477278] [2020-12-09 17:35:38,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 17:35:38,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 17:35:38,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-12-09 17:35:38,510 INFO L87 Difference]: Start difference. First operand 304 states and 407 transitions. Second operand 18 states. [2020-12-09 17:35:39,195 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-12-09 17:35:39,505 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-09 17:35:39,726 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-09 17:35:39,969 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-09 17:35:40,718 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 112 [2020-12-09 17:35:41,153 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2020-12-09 17:35:41,355 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-12-09 17:35:41,907 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 112 [2020-12-09 17:35:42,242 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-12-09 17:35:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:42,526 INFO L93 Difference]: Finished difference Result 948 states and 1206 transitions. [2020-12-09 17:35:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-09 17:35:42,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-12-09 17:35:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:42,530 INFO L225 Difference]: With dead ends: 948 [2020-12-09 17:35:42,530 INFO L226 Difference]: Without dead ends: 944 [2020-12-09 17:35:42,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2020-12-09 17:35:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-12-09 17:35:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 448. [2020-12-09 17:35:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-12-09 17:35:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 595 transitions. [2020-12-09 17:35:42,540 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 595 transitions. Word has length 19 [2020-12-09 17:35:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:42,540 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 595 transitions. [2020-12-09 17:35:42,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 17:35:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 595 transitions. [2020-12-09 17:35:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 17:35:42,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:42,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:42,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-09 17:35:42,741 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:42,742 INFO L82 PathProgramCache]: Analyzing trace with hash 575526217, now seen corresponding path program 1 times [2020-12-09 17:35:42,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:42,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685277118] [2020-12-09 17:35:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:42,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685277118] [2020-12-09 17:35:42,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:42,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:35:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725591632] [2020-12-09 17:35:42,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:35:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:35:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:42,810 INFO L87 Difference]: Start difference. First operand 448 states and 595 transitions. Second operand 7 states. [2020-12-09 17:35:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:43,135 INFO L93 Difference]: Finished difference Result 979 states and 1234 transitions. [2020-12-09 17:35:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 17:35:43,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-09 17:35:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:43,139 INFO L225 Difference]: With dead ends: 979 [2020-12-09 17:35:43,139 INFO L226 Difference]: Without dead ends: 979 [2020-12-09 17:35:43,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:35:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2020-12-09 17:35:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 504. [2020-12-09 17:35:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-12-09 17:35:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 657 transitions. [2020-12-09 17:35:43,150 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 657 transitions. Word has length 20 [2020-12-09 17:35:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:43,150 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 657 transitions. [2020-12-09 17:35:43,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:35:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 657 transitions. [2020-12-09 17:35:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 17:35:43,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:43,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:43,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-12-09 17:35:43,152 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash 661443763, now seen corresponding path program 1 times [2020-12-09 17:35:43,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:43,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466676944] [2020-12-09 17:35:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:43,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466676944] [2020-12-09 17:35:43,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:43,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:35:43,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825667825] [2020-12-09 17:35:43,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:43,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:43,194 INFO L87 Difference]: Start difference. First operand 504 states and 657 transitions. Second operand 5 states. [2020-12-09 17:35:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:43,341 INFO L93 Difference]: Finished difference Result 597 states and 741 transitions. [2020-12-09 17:35:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:43,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-09 17:35:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:43,344 INFO L225 Difference]: With dead ends: 597 [2020-12-09 17:35:43,344 INFO L226 Difference]: Without dead ends: 597 [2020-12-09 17:35:43,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-12-09 17:35:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 504. [2020-12-09 17:35:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-12-09 17:35:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 649 transitions. [2020-12-09 17:35:43,350 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 649 transitions. Word has length 21 [2020-12-09 17:35:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:43,350 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 649 transitions. [2020-12-09 17:35:43,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 649 transitions. [2020-12-09 17:35:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 17:35:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:43,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-12-09 17:35:43,350 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1162899609, now seen corresponding path program 1 times [2020-12-09 17:35:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:43,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93445934] [2020-12-09 17:35:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:43,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93445934] [2020-12-09 17:35:43,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106812905] [2020-12-09 17:35:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:35:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 17:35:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:35:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:43,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:35:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:43,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224080311] [2020-12-09 17:35:43,673 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-12-09 17:35:43,673 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:35:43,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:35:43,674 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:35:43,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:35:43,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:43,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:43,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:43,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:43,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:44,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:44,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:44,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:44,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:44,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:44,916 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:35:45,218 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-12-09 17:35:45,401 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-12-09 17:35:45,588 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-12-09 17:35:45,943 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 127 [2020-12-09 17:35:46,329 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 134 [2020-12-09 17:35:46,753 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 139 [2020-12-09 17:35:47,191 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 145 [2020-12-09 17:35:47,696 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 153 [2020-12-09 17:35:48,309 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 157 [2020-12-09 17:35:48,845 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 157 [2020-12-09 17:35:49,458 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 165 [2020-12-09 17:35:50,220 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 171 [2020-12-09 17:35:50,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:35:50,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5, 5] total 29 [2020-12-09 17:35:50,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102332924] [2020-12-09 17:35:50,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 17:35:50,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:50,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 17:35:50,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-12-09 17:35:50,223 INFO L87 Difference]: Start difference. First operand 504 states and 649 transitions. Second operand 15 states. [2020-12-09 17:35:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:50,971 INFO L93 Difference]: Finished difference Result 533 states and 680 transitions. [2020-12-09 17:35:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 17:35:50,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-12-09 17:35:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:50,973 INFO L225 Difference]: With dead ends: 533 [2020-12-09 17:35:50,973 INFO L226 Difference]: Without dead ends: 533 [2020-12-09 17:35:50,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-12-09 17:35:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-12-09 17:35:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 516. [2020-12-09 17:35:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-12-09 17:35:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 661 transitions. [2020-12-09 17:35:50,979 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 661 transitions. Word has length 21 [2020-12-09 17:35:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:50,979 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 661 transitions. [2020-12-09 17:35:50,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 17:35:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 661 transitions. [2020-12-09 17:35:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 17:35:50,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:50,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:51,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-09 17:35:51,181 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:35:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:51,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1844848457, now seen corresponding path program 1 times [2020-12-09 17:35:51,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:51,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927654167] [2020-12-09 17:35:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:51,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927654167] [2020-12-09 17:35:51,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626440751] [2020-12-09 17:35:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:35:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 17:35:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:35:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:51,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:35:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:35:51,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177082294] [2020-12-09 17:35:51,567 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-12-09 17:35:51,567 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:35:51,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:35:51,568 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:35:51,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:35:51,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:51,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:51,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:51,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:51,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:52,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:53,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:54,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:35:55,054 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:35:55,296 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-12-09 17:35:55,468 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-12-09 17:35:56,375 WARN L197 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 203 [2020-12-09 17:35:56,716 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-09 17:35:56,940 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-12-09 17:35:57,214 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 110 [2020-12-09 17:35:57,526 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2020-12-09 17:35:57,880 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 126 [2020-12-09 17:35:58,270 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 128 [2020-12-09 17:35:58,656 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 132 [2020-12-09 17:35:59,055 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 130 [2020-12-09 17:35:59,483 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 138 [2020-12-09 17:36:00,041 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 139 [2020-12-09 17:36:00,500 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 137 [2020-12-09 17:36:00,981 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 137 [2020-12-09 17:36:00,982 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:36:00,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:36:00,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2020-12-09 17:36:00,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297267537] [2020-12-09 17:36:00,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 17:36:00,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:00,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 17:36:00,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 17:36:00,983 INFO L87 Difference]: Start difference. First operand 516 states and 661 transitions. Second operand 17 states. [2020-12-09 17:36:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:01,114 INFO L93 Difference]: Finished difference Result 527 states and 650 transitions. [2020-12-09 17:36:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:36:01,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-12-09 17:36:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:01,117 INFO L225 Difference]: With dead ends: 527 [2020-12-09 17:36:01,117 INFO L226 Difference]: Without dead ends: 527 [2020-12-09 17:36:01,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=340, Invalid=992, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 17:36:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-12-09 17:36:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 487. [2020-12-09 17:36:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-12-09 17:36:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 618 transitions. [2020-12-09 17:36:01,122 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 618 transitions. Word has length 22 [2020-12-09 17:36:01,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:01,122 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 618 transitions. [2020-12-09 17:36:01,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 17:36:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 618 transitions. [2020-12-09 17:36:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 17:36:01,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:01,122 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:01,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-09 17:36:01,324 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 913814029, now seen corresponding path program 1 times [2020-12-09 17:36:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:01,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634293310] [2020-12-09 17:36:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634293310] [2020-12-09 17:36:01,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:01,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:36:01,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819461353] [2020-12-09 17:36:01,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:36:01,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:36:01,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:36:01,433 INFO L87 Difference]: Start difference. First operand 487 states and 618 transitions. Second operand 7 states. [2020-12-09 17:36:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:01,569 INFO L93 Difference]: Finished difference Result 575 states and 706 transitions. [2020-12-09 17:36:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:36:01,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-09 17:36:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:01,571 INFO L225 Difference]: With dead ends: 575 [2020-12-09 17:36:01,571 INFO L226 Difference]: Without dead ends: 575 [2020-12-09 17:36:01,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:36:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-12-09 17:36:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 485. [2020-12-09 17:36:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-12-09 17:36:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 614 transitions. [2020-12-09 17:36:01,576 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 614 transitions. Word has length 24 [2020-12-09 17:36:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:01,577 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 614 transitions. [2020-12-09 17:36:01,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:36:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 614 transitions. [2020-12-09 17:36:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 17:36:01,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:01,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:01,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2020-12-09 17:36:01,577 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:01,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1558059801, now seen corresponding path program 1 times [2020-12-09 17:36:01,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:01,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703637747] [2020-12-09 17:36:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:01,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703637747] [2020-12-09 17:36:01,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:01,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:36:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638106355] [2020-12-09 17:36:01,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:01,605 INFO L87 Difference]: Start difference. First operand 485 states and 614 transitions. Second operand 4 states. [2020-12-09 17:36:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:01,619 INFO L93 Difference]: Finished difference Result 475 states and 582 transitions. [2020-12-09 17:36:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:36:01,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-09 17:36:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:01,622 INFO L225 Difference]: With dead ends: 475 [2020-12-09 17:36:01,622 INFO L226 Difference]: Without dead ends: 475 [2020-12-09 17:36:01,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-09 17:36:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 333. [2020-12-09 17:36:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-12-09 17:36:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 427 transitions. [2020-12-09 17:36:01,626 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 427 transitions. Word has length 26 [2020-12-09 17:36:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:01,626 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 427 transitions. [2020-12-09 17:36:01,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 427 transitions. [2020-12-09 17:36:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 17:36:01,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:01,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:01,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2020-12-09 17:36:01,627 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash 485330765, now seen corresponding path program 1 times [2020-12-09 17:36:01,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:01,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503821403] [2020-12-09 17:36:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:36:01,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503821403] [2020-12-09 17:36:01,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313065629] [2020-12-09 17:36:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:36:01,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:01,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:36:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:01,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686945951] [2020-12-09 17:36:01,808 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2020-12-09 17:36:01,808 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:36:01,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:36:01,808 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:36:01,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:36:01,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:02,326 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:36:02,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:36:02,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2020-12-09 17:36:02,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615825916] [2020-12-09 17:36:02,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 17:36:02,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 17:36:02,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:36:02,328 INFO L87 Difference]: Start difference. First operand 333 states and 427 transitions. Second operand 13 states. [2020-12-09 17:36:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:02,924 INFO L93 Difference]: Finished difference Result 885 states and 1074 transitions. [2020-12-09 17:36:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 17:36:02,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-09 17:36:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:02,927 INFO L225 Difference]: With dead ends: 885 [2020-12-09 17:36:02,927 INFO L226 Difference]: Without dead ends: 885 [2020-12-09 17:36:02,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2020-12-09 17:36:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-12-09 17:36:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 399. [2020-12-09 17:36:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-09 17:36:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 514 transitions. [2020-12-09 17:36:02,933 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 514 transitions. Word has length 27 [2020-12-09 17:36:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:02,933 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 514 transitions. [2020-12-09 17:36:02,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 17:36:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 514 transitions. [2020-12-09 17:36:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 17:36:02,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:02,933 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:03,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:03,135 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1935952576, now seen corresponding path program 1 times [2020-12-09 17:36:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:03,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289220414] [2020-12-09 17:36:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:36:03,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289220414] [2020-12-09 17:36:03,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:03,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:36:03,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402394840] [2020-12-09 17:36:03,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:36:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:36:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:36:03,255 INFO L87 Difference]: Start difference. First operand 399 states and 514 transitions. Second operand 7 states. [2020-12-09 17:36:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:03,405 INFO L93 Difference]: Finished difference Result 498 states and 614 transitions. [2020-12-09 17:36:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 17:36:03,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-09 17:36:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:03,407 INFO L225 Difference]: With dead ends: 498 [2020-12-09 17:36:03,407 INFO L226 Difference]: Without dead ends: 498 [2020-12-09 17:36:03,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:36:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-09 17:36:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 398. [2020-12-09 17:36:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-12-09 17:36:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 513 transitions. [2020-12-09 17:36:03,412 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 513 transitions. Word has length 27 [2020-12-09 17:36:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:03,412 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 513 transitions. [2020-12-09 17:36:03,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:36:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 513 transitions. [2020-12-09 17:36:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 17:36:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:03,412 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-09 17:36:03,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2020-12-09 17:36:03,413 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1422396260, now seen corresponding path program 1 times [2020-12-09 17:36:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822696591] [2020-12-09 17:36:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822696591] [2020-12-09 17:36:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948536906] [2020-12-09 17:36:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:03,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 17:36:03,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:03,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:36:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:03,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 17:36:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2020-12-09 17:36:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101129411] [2020-12-09 17:36:03,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:36:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:36:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-09 17:36:03,751 INFO L87 Difference]: Start difference. First operand 398 states and 513 transitions. Second operand 7 states. [2020-12-09 17:36:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:03,861 INFO L93 Difference]: Finished difference Result 414 states and 512 transitions. [2020-12-09 17:36:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:36:03,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-09 17:36:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:03,863 INFO L225 Difference]: With dead ends: 414 [2020-12-09 17:36:03,863 INFO L226 Difference]: Without dead ends: 414 [2020-12-09 17:36:03,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:36:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-09 17:36:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 397. [2020-12-09 17:36:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-09 17:36:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 511 transitions. [2020-12-09 17:36:03,867 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 511 transitions. Word has length 28 [2020-12-09 17:36:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:03,867 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 511 transitions. [2020-12-09 17:36:03,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:36:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 511 transitions. [2020-12-09 17:36:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 17:36:03,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:03,868 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:04,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-12-09 17:36:04,070 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash -115012103, now seen corresponding path program 1 times [2020-12-09 17:36:04,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:04,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520542264] [2020-12-09 17:36:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:04,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520542264] [2020-12-09 17:36:04,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:04,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-09 17:36:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103387069] [2020-12-09 17:36:04,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 17:36:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 17:36:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-09 17:36:04,532 INFO L87 Difference]: Start difference. First operand 397 states and 511 transitions. Second operand 14 states. [2020-12-09 17:36:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:05,490 INFO L93 Difference]: Finished difference Result 820 states and 1007 transitions. [2020-12-09 17:36:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 17:36:05,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-09 17:36:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:05,493 INFO L225 Difference]: With dead ends: 820 [2020-12-09 17:36:05,493 INFO L226 Difference]: Without dead ends: 819 [2020-12-09 17:36:05,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-09 17:36:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-12-09 17:36:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 426. [2020-12-09 17:36:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-12-09 17:36:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 549 transitions. [2020-12-09 17:36:05,499 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 549 transitions. Word has length 28 [2020-12-09 17:36:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:05,499 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 549 transitions. [2020-12-09 17:36:05,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 17:36:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 549 transitions. [2020-12-09 17:36:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 17:36:05,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:05,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:05,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2020-12-09 17:36:05,500 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1116634966, now seen corresponding path program 1 times [2020-12-09 17:36:05,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:05,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363547687] [2020-12-09 17:36:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:05,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363547687] [2020-12-09 17:36:05,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46856827] [2020-12-09 17:36:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-09 17:36:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:06,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:36:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277892439] [2020-12-09 17:36:06,452 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-12-09 17:36:06,452 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:36:06,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:36:06,452 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:36:06,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:36:06,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:06,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:06,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:06,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:06,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:07,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:08,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:09,887 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:36:10,249 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 132 [2020-12-09 17:36:10,587 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-12-09 17:36:11,662 WARN L197 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 203 [2020-12-09 17:36:12,101 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-09 17:36:12,365 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-12-09 17:36:12,687 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 110 [2020-12-09 17:36:13,040 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2020-12-09 17:36:13,452 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 126 [2020-12-09 17:36:13,868 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 128 [2020-12-09 17:36:14,279 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 132 [2020-12-09 17:36:14,671 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 130 [2020-12-09 17:36:15,108 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 138 [2020-12-09 17:36:15,713 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 139 [2020-12-09 17:36:16,217 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 137 [2020-12-09 17:36:16,721 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 137 [2020-12-09 17:36:17,137 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 129 [2020-12-09 17:36:17,137 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:36:17,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:36:17,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 23 [2020-12-09 17:36:17,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513429816] [2020-12-09 17:36:17,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 17:36:17,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 17:36:17,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2020-12-09 17:36:17,139 INFO L87 Difference]: Start difference. First operand 426 states and 549 transitions. Second operand 24 states. [2020-12-09 17:36:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:18,588 INFO L93 Difference]: Finished difference Result 896 states and 1089 transitions. [2020-12-09 17:36:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-09 17:36:18,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-09 17:36:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:18,591 INFO L225 Difference]: With dead ends: 896 [2020-12-09 17:36:18,591 INFO L226 Difference]: Without dead ends: 896 [2020-12-09 17:36:18,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2020-12-09 17:36:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-09 17:36:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 466. [2020-12-09 17:36:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-12-09 17:36:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 604 transitions. [2020-12-09 17:36:18,599 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 604 transitions. Word has length 28 [2020-12-09 17:36:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:18,599 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 604 transitions. [2020-12-09 17:36:18,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 17:36:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 604 transitions. [2020-12-09 17:36:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 17:36:18,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:18,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:18,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:18,801 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:18,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1116634965, now seen corresponding path program 1 times [2020-12-09 17:36:18,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:18,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224170538] [2020-12-09 17:36:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:19,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224170538] [2020-12-09 17:36:19,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441088654] [2020-12-09 17:36:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-09 17:36:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:20,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:36:20,663 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-09 17:36:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:21,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287219681] [2020-12-09 17:36:21,471 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-12-09 17:36:21,471 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:36:21,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:36:21,471 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:36:21,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:36:21,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:21,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:22,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:23,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:36:24,927 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:36:25,393 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 136 [2020-12-09 17:36:25,564 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-12-09 17:36:25,796 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-12-09 17:36:26,897 WARN L197 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 203 [2020-12-09 17:36:27,407 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-09 17:36:27,722 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-12-09 17:36:28,073 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 110 [2020-12-09 17:36:28,468 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2020-12-09 17:36:28,909 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 126 [2020-12-09 17:36:29,359 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 128 [2020-12-09 17:36:29,828 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 132 [2020-12-09 17:36:30,288 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 130 [2020-12-09 17:36:30,828 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 138 [2020-12-09 17:36:31,516 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 139 [2020-12-09 17:36:32,096 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 137 [2020-12-09 17:36:32,665 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 137 [2020-12-09 17:36:33,173 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 129 [2020-12-09 17:36:33,174 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:36:33,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:36:33,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 32 [2020-12-09 17:36:33,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468592864] [2020-12-09 17:36:33,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-09 17:36:33,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-09 17:36:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 17:36:33,175 INFO L87 Difference]: Start difference. First operand 466 states and 604 transitions. Second operand 33 states. [2020-12-09 17:36:33,886 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2020-12-09 17:36:34,352 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 68 [2020-12-09 17:36:34,540 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2020-12-09 17:36:34,896 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 81 [2020-12-09 17:36:35,143 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-12-09 17:36:35,952 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2020-12-09 17:36:37,071 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2020-12-09 17:36:37,247 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2020-12-09 17:36:37,464 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2020-12-09 17:36:37,829 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2020-12-09 17:36:38,457 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 79 [2020-12-09 17:36:39,043 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-12-09 17:36:39,300 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-12-09 17:36:39,450 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2020-12-09 17:36:39,855 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-12-09 17:36:40,361 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2020-12-09 17:36:40,534 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 73 [2020-12-09 17:36:41,065 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 93 [2020-12-09 17:36:41,458 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 88 [2020-12-09 17:36:41,658 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 73 [2020-12-09 17:36:42,018 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2020-12-09 17:36:42,395 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 95 [2020-12-09 17:36:42,914 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-12-09 17:36:43,160 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 93 [2020-12-09 17:36:44,037 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-12-09 17:36:44,276 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2020-12-09 17:36:44,495 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-12-09 17:36:44,912 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2020-12-09 17:36:45,087 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-12-09 17:36:45,703 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 78 [2020-12-09 17:36:45,925 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 76 [2020-12-09 17:36:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:46,066 INFO L93 Difference]: Finished difference Result 2021 states and 2373 transitions. [2020-12-09 17:36:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-09 17:36:46,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 28 [2020-12-09 17:36:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:46,073 INFO L225 Difference]: With dead ends: 2021 [2020-12-09 17:36:46,073 INFO L226 Difference]: Without dead ends: 2021 [2020-12-09 17:36:46,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4458 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=2574, Invalid=12188, Unknown=0, NotChecked=0, Total=14762 [2020-12-09 17:36:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-12-09 17:36:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 491. [2020-12-09 17:36:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-09 17:36:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 636 transitions. [2020-12-09 17:36:46,086 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 636 transitions. Word has length 28 [2020-12-09 17:36:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:46,087 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 636 transitions. [2020-12-09 17:36:46,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-09 17:36:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 636 transitions. [2020-12-09 17:36:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 17:36:46,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:46,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:46,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:46,289 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash 729962693, now seen corresponding path program 1 times [2020-12-09 17:36:46,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:46,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641343746] [2020-12-09 17:36:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:36:46,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641343746] [2020-12-09 17:36:46,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:46,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 17:36:46,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630655547] [2020-12-09 17:36:46,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 17:36:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 17:36:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:36:46,400 INFO L87 Difference]: Start difference. First operand 491 states and 636 transitions. Second operand 7 states. [2020-12-09 17:36:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:46,624 INFO L93 Difference]: Finished difference Result 680 states and 847 transitions. [2020-12-09 17:36:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:36:46,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-09 17:36:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:46,627 INFO L225 Difference]: With dead ends: 680 [2020-12-09 17:36:46,627 INFO L226 Difference]: Without dead ends: 680 [2020-12-09 17:36:46,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-09 17:36:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-12-09 17:36:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 489. [2020-12-09 17:36:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-09 17:36:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 631 transitions. [2020-12-09 17:36:46,632 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 631 transitions. Word has length 29 [2020-12-09 17:36:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:46,632 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 631 transitions. [2020-12-09 17:36:46,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 17:36:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 631 transitions. [2020-12-09 17:36:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 17:36:46,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:46,633 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2020-12-09 17:36:46,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2020-12-09 17:36:46,633 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1123163535, now seen corresponding path program 1 times [2020-12-09 17:36:46,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:46,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769371606] [2020-12-09 17:36:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:46,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769371606] [2020-12-09 17:36:46,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186775232] [2020-12-09 17:36:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 17:36:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:46,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:36:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:46,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:36:46,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 4 [2020-12-09 17:36:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287560218] [2020-12-09 17:36:46,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:36:46,758 INFO L87 Difference]: Start difference. First operand 489 states and 631 transitions. Second operand 4 states. [2020-12-09 17:36:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:46,771 INFO L93 Difference]: Finished difference Result 646 states and 822 transitions. [2020-12-09 17:36:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:36:46,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-12-09 17:36:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:46,774 INFO L225 Difference]: With dead ends: 646 [2020-12-09 17:36:46,774 INFO L226 Difference]: Without dead ends: 646 [2020-12-09 17:36:46,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:36:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-12-09 17:36:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 517. [2020-12-09 17:36:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-12-09 17:36:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 670 transitions. [2020-12-09 17:36:46,779 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 670 transitions. Word has length 30 [2020-12-09 17:36:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:46,779 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 670 transitions. [2020-12-09 17:36:46,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 670 transitions. [2020-12-09 17:36:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 17:36:46,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:46,780 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2020-12-09 17:36:46,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2020-12-09 17:36:46,981 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:46,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1123165408, now seen corresponding path program 1 times [2020-12-09 17:36:46,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:36:46,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915668359] [2020-12-09 17:36:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:36:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:47,496 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-12-09 17:36:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915668359] [2020-12-09 17:36:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785360125] [2020-12-09 17:36:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-09 17:36:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:48,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:36:48,295 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 17:36:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64669310] [2020-12-09 17:36:48,297 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2020-12-09 17:36:48,297 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:36:48,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:36:48,297 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:36:48,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:36:48,314 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@19682695 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:36:48,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:36:48,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-09 17:36:48,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573506186] [2020-12-09 17:36:48,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 17:36:48,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:36:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 17:36:48,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-12-09 17:36:48,316 INFO L87 Difference]: Start difference. First operand 517 states and 670 transitions. Second operand 11 states. [2020-12-09 17:36:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:36:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:36:48,518 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@19682695 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:36:48,524 INFO L168 Benchmark]: Toolchain (without parser) took 79411.18 ms. Allocated memory was 100.7 MB in the beginning and 308.3 MB in the end (delta: 207.6 MB). Free memory was 62.3 MB in the beginning and 199.3 MB in the end (delta: -137.0 MB). Peak memory consumption was 70.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:36:48,525 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 100.7 MB. Free memory was 80.2 MB in the beginning and 80.2 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:36:48,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.55 ms. Allocated memory is still 100.7 MB. Free memory was 62.1 MB in the beginning and 52.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:36:48,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.10 ms. Allocated memory is still 100.7 MB. Free memory was 52.6 MB in the beginning and 50.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:36:48,526 INFO L168 Benchmark]: Boogie Preprocessor took 36.80 ms. Allocated memory is still 100.7 MB. Free memory was 50.0 MB in the beginning and 47.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:36:48,527 INFO L168 Benchmark]: RCFGBuilder took 640.18 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 47.5 MB in the beginning and 73.2 MB in the end (delta: -25.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:36:48,528 INFO L168 Benchmark]: TraceAbstraction took 78249.69 ms. Allocated memory was 121.6 MB in the beginning and 308.3 MB in the end (delta: 186.6 MB). Free memory was 72.4 MB in the beginning and 199.3 MB in the end (delta: -126.9 MB). Peak memory consumption was 59.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:36:48,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 100.7 MB. Free memory was 80.2 MB in the beginning and 80.2 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 430.55 ms. Allocated memory is still 100.7 MB. Free memory was 62.1 MB in the beginning and 52.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.10 ms. Allocated memory is still 100.7 MB. Free memory was 52.6 MB in the beginning and 50.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.80 ms. Allocated memory is still 100.7 MB. Free memory was 50.0 MB in the beginning and 47.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 640.18 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 47.5 MB in the beginning and 73.2 MB in the end (delta: -25.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 78249.69 ms. Allocated memory was 121.6 MB in the beginning and 308.3 MB in the end (delta: 186.6 MB). Free memory was 72.4 MB in the beginning and 199.3 MB in the end (delta: -126.9 MB). Peak memory consumption was 59.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@19682695 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@19682695: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:36:49,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:36:49,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:36:50,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:36:50,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:36:50,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:36:50,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:36:50,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:36:50,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:36:50,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:36:50,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:36:50,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:36:50,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:36:50,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:36:50,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:36:50,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:36:50,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:36:50,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:36:50,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:36:50,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:36:50,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:36:50,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:36:50,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:36:50,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:36:50,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:36:50,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:36:50,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:36:50,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:36:50,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:36:50,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:36:50,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:36:50,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:36:50,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:36:50,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:36:50,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:36:50,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:36:50,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:36:50,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:36:50,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:36:50,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:36:50,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:36:50,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 17:36:50,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:36:50,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:36:50,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:36:50,086 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:36:50,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:36:50,086 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:36:50,086 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:36:50,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:36:50,087 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:36:50,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:36:50,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:36:50,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:36:50,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:36:50,088 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:36:50,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:36:50,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:36:50,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 17:36:50,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:36:50,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:36:50,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:36:50,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 17:36:50,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:36:50,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:36:50,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:36:50,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:36:50,090 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 17:36:50,091 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 17:36:50,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:36:50,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:36:50,091 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-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37e69ef296564883bb35e755c16874865eb9c81e [2020-12-09 17:36:50,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:36:50,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:36:50,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:36:50,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:36:50,359 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:36:50,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2020-12-09 17:36:50,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/38db3942e/5479e7db7d154987824f001c021ea940/FLAG278e00f41 [2020-12-09 17:36:50,831 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:36:50,832 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2020-12-09 17:36:50,843 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/38db3942e/5479e7db7d154987824f001c021ea940/FLAG278e00f41 [2020-12-09 17:36:50,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/data/38db3942e/5479e7db7d154987824f001c021ea940 [2020-12-09 17:36:50,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:36:50,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:36:50,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:36:50,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:36:50,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:36:50,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:36:50" (1/1) ... [2020-12-09 17:36:50,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5f4f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:50, skipping insertion in model container [2020-12-09 17:36:50,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:36:50" (1/1) ... [2020-12-09 17:36:50,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:36:50,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:36:51,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:36:51,143 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:36:51,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:36:51,242 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:36:51,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51 WrapperNode [2020-12-09 17:36:51,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:36:51,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:36:51,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:36:51,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:36:51,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:36:51,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:36:51,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:36:51,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:36:51,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... [2020-12-09 17:36:51,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:36:51,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:36:51,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:36:51,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:36:51,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 17:36:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 17:36:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:36:51,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:36:52,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:36:52,040 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-09 17:36:52,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:36:52 BoogieIcfgContainer [2020-12-09 17:36:52,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:36:52,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:36:52,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:36:52,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:36:52,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:36:50" (1/3) ... [2020-12-09 17:36:52,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a991a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:36:52, skipping insertion in model container [2020-12-09 17:36:52,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:36:51" (2/3) ... [2020-12-09 17:36:52,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a991a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:36:52, skipping insertion in model container [2020-12-09 17:36:52,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:36:52" (3/3) ... [2020-12-09 17:36:52,047 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2020-12-09 17:36:52,056 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:36:52,059 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 57 error locations. [2020-12-09 17:36:52,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2020-12-09 17:36:52,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:36:52,081 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:36:52,081 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:36:52,081 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:36:52,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:36:52,081 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:36:52,081 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:36:52,081 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:36:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-12-09 17:36:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:36:52,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:52,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:36:52,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:52,103 INFO L82 PathProgramCache]: Analyzing trace with hash 896340778, now seen corresponding path program 1 times [2020-12-09 17:36:52,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:52,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260027113] [2020-12-09 17:36:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 17:36:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:52,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:52,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260027113] [2020-12-09 17:36:52,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:52,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:52,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971076879] [2020-12-09 17:36:52,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:36:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:36:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:36:52,217 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 2 states. [2020-12-09 17:36:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:52,232 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-12-09 17:36:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:36:52,232 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 17:36:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:52,239 INFO L225 Difference]: With dead ends: 142 [2020-12-09 17:36:52,239 INFO L226 Difference]: Without dead ends: 139 [2020-12-09 17:36:52,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:36:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-09 17:36:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-09 17:36:52,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-09 17:36:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2020-12-09 17:36:52,273 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 6 [2020-12-09 17:36:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:52,274 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2020-12-09 17:36:52,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:36:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2020-12-09 17:36:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:36:52,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:52,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:36:52,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 17:36:52,477 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:52,480 INFO L82 PathProgramCache]: Analyzing trace with hash 889846340, now seen corresponding path program 1 times [2020-12-09 17:36:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:52,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725827941] [2020-12-09 17:36:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:36:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:52,748 INFO L348 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2020-12-09 17:36:52,749 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 41 [2020-12-09 17:36:52,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:52,791 INFO L625 ElimStorePlain]: treesize reduction 12, result has 72.1 percent of original size [2020-12-09 17:36:52,802 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:52,806 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:52,809 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:36:52,812 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 17:36:52,812 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:33 [2020-12-09 17:36:52,816 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:52,818 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:52,820 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:36:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:52,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:52,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725827941] [2020-12-09 17:36:52,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:52,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:36:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90933198] [2020-12-09 17:36:52,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:36:52,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:36:52,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:36:52,851 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 3 states. [2020-12-09 17:36:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:53,243 INFO L93 Difference]: Finished difference Result 268 states and 299 transitions. [2020-12-09 17:36:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:36:53,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 17:36:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:53,247 INFO L225 Difference]: With dead ends: 268 [2020-12-09 17:36:53,247 INFO L226 Difference]: Without dead ends: 268 [2020-12-09 17:36:53,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:36:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-09 17:36:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 183. [2020-12-09 17:36:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-09 17:36:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 236 transitions. [2020-12-09 17:36:53,260 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 236 transitions. Word has length 6 [2020-12-09 17:36:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:53,260 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 236 transitions. [2020-12-09 17:36:53,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:36:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 236 transitions. [2020-12-09 17:36:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:36:53,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:53,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:36:53,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 17:36:53,463 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 889846341, now seen corresponding path program 1 times [2020-12-09 17:36:53,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:53,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44198527] [2020-12-09 17:36:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:36:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:53,611 INFO L348 Elim1Store]: treesize reduction 13, result has 76.4 percent of original size [2020-12-09 17:36:53,611 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 47 [2020-12-09 17:36:53,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:53,649 INFO L625 ElimStorePlain]: treesize reduction 20, result has 60.0 percent of original size [2020-12-09 17:36:53,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:36:53,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:9 [2020-12-09 17:36:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:53,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:53,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44198527] [2020-12-09 17:36:53,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:53,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:53,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317244649] [2020-12-09 17:36:53,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:53,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:53,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:53,673 INFO L87 Difference]: Start difference. First operand 183 states and 236 transitions. Second operand 4 states. [2020-12-09 17:36:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:54,147 INFO L93 Difference]: Finished difference Result 322 states and 400 transitions. [2020-12-09 17:36:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:36:54,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 17:36:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:54,150 INFO L225 Difference]: With dead ends: 322 [2020-12-09 17:36:54,150 INFO L226 Difference]: Without dead ends: 322 [2020-12-09 17:36:54,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-09 17:36:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 248. [2020-12-09 17:36:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-09 17:36:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 353 transitions. [2020-12-09 17:36:54,164 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 353 transitions. Word has length 6 [2020-12-09 17:36:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:54,165 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 353 transitions. [2020-12-09 17:36:54,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 353 transitions. [2020-12-09 17:36:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:36:54,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:54,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:36:54,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 17:36:54,367 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash 889846403, now seen corresponding path program 1 times [2020-12-09 17:36:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:54,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113450539] [2020-12-09 17:36:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:36:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:54,493 INFO L348 Elim1Store]: treesize reduction 13, result has 76.4 percent of original size [2020-12-09 17:36:54,494 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 47 [2020-12-09 17:36:54,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:54,530 INFO L625 ElimStorePlain]: treesize reduction 20, result has 60.0 percent of original size [2020-12-09 17:36:54,534 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:36:54,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:9 [2020-12-09 17:36:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:54,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113450539] [2020-12-09 17:36:54,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:54,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521996966] [2020-12-09 17:36:54,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:54,556 INFO L87 Difference]: Start difference. First operand 248 states and 353 transitions. Second operand 4 states. [2020-12-09 17:36:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:54,999 INFO L93 Difference]: Finished difference Result 321 states and 398 transitions. [2020-12-09 17:36:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:36:55,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 17:36:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:55,002 INFO L225 Difference]: With dead ends: 321 [2020-12-09 17:36:55,002 INFO L226 Difference]: Without dead ends: 321 [2020-12-09 17:36:55,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:55,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-09 17:36:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 248. [2020-12-09 17:36:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-09 17:36:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 353 transitions. [2020-12-09 17:36:55,015 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 353 transitions. Word has length 6 [2020-12-09 17:36:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:55,016 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 353 transitions. [2020-12-09 17:36:55,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 353 transitions. [2020-12-09 17:36:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:36:55,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:55,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:55,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 17:36:55,219 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1810846157, now seen corresponding path program 1 times [2020-12-09 17:36:55,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:55,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595395965] [2020-12-09 17:36:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:36:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:55,344 INFO L348 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2020-12-09 17:36:55,345 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 41 [2020-12-09 17:36:55,347 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:55,368 INFO L625 ElimStorePlain]: treesize reduction 12, result has 72.1 percent of original size [2020-12-09 17:36:55,371 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:55,372 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:55,373 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:36:55,374 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 17:36:55,374 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:33 [2020-12-09 17:36:55,376 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:55,377 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:55,378 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:36:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:55,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:55,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595395965] [2020-12-09 17:36:55,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:55,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:55,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283996796] [2020-12-09 17:36:55,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:55,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:55,398 INFO L87 Difference]: Start difference. First operand 248 states and 353 transitions. Second operand 4 states. [2020-12-09 17:36:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:55,954 INFO L93 Difference]: Finished difference Result 462 states and 554 transitions. [2020-12-09 17:36:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:36:55,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 17:36:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:55,956 INFO L225 Difference]: With dead ends: 462 [2020-12-09 17:36:55,956 INFO L226 Difference]: Without dead ends: 462 [2020-12-09 17:36:55,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:36:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-09 17:36:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 243. [2020-12-09 17:36:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-09 17:36:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 342 transitions. [2020-12-09 17:36:55,965 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 342 transitions. Word has length 7 [2020-12-09 17:36:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:55,965 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 342 transitions. [2020-12-09 17:36:55,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 342 transitions. [2020-12-09 17:36:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:36:55,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:55,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:56,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 17:36:56,167 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1810846158, now seen corresponding path program 1 times [2020-12-09 17:36:56,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:56,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742708397] [2020-12-09 17:36:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:56,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 17:36:56,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:56,291 INFO L348 Elim1Store]: treesize reduction 13, result has 76.4 percent of original size [2020-12-09 17:36:56,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 47 [2020-12-09 17:36:56,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:56,327 INFO L625 ElimStorePlain]: treesize reduction 20, result has 60.0 percent of original size [2020-12-09 17:36:56,331 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:36:56,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:9 [2020-12-09 17:36:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:56,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742708397] [2020-12-09 17:36:56,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:56,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:36:56,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124529634] [2020-12-09 17:36:56,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:36:56,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:36:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:36:56,362 INFO L87 Difference]: Start difference. First operand 243 states and 342 transitions. Second operand 5 states. [2020-12-09 17:36:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:56,920 INFO L93 Difference]: Finished difference Result 319 states and 392 transitions. [2020-12-09 17:36:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:36:56,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 17:36:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:56,922 INFO L225 Difference]: With dead ends: 319 [2020-12-09 17:36:56,922 INFO L226 Difference]: Without dead ends: 319 [2020-12-09 17:36:56,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:36:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-09 17:36:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 249. [2020-12-09 17:36:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-09 17:36:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 349 transitions. [2020-12-09 17:36:56,927 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 349 transitions. Word has length 7 [2020-12-09 17:36:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:56,927 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 349 transitions. [2020-12-09 17:36:56,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:36:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 349 transitions. [2020-12-09 17:36:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:36:56,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:56,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:57,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 17:36:57,129 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash 302547855, now seen corresponding path program 1 times [2020-12-09 17:36:57,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:57,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252312162] [2020-12-09 17:36:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:36:57,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:57,357 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2020-12-09 17:36:57,358 INFO L348 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2020-12-09 17:36:57,359 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 41 [2020-12-09 17:36:57,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:57,404 INFO L625 ElimStorePlain]: treesize reduction 12, result has 72.1 percent of original size [2020-12-09 17:36:57,407 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:57,409 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:57,410 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:36:57,412 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 17:36:57,412 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:33 [2020-12-09 17:36:57,414 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:57,415 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:36:57,416 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:36:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:57,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:57,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252312162] [2020-12-09 17:36:57,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:57,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:57,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320732416] [2020-12-09 17:36:57,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:57,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:57,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:57,440 INFO L87 Difference]: Start difference. First operand 249 states and 349 transitions. Second operand 4 states. [2020-12-09 17:36:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:58,146 INFO L93 Difference]: Finished difference Result 555 states and 718 transitions. [2020-12-09 17:36:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:36:58,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:36:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:58,152 INFO L225 Difference]: With dead ends: 555 [2020-12-09 17:36:58,153 INFO L226 Difference]: Without dead ends: 555 [2020-12-09 17:36:58,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:36:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-12-09 17:36:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 247. [2020-12-09 17:36:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-09 17:36:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2020-12-09 17:36:58,158 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 8 [2020-12-09 17:36:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:58,158 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2020-12-09 17:36:58,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2020-12-09 17:36:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:36:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:58,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:58,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 17:36:58,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash 302547856, now seen corresponding path program 1 times [2020-12-09 17:36:58,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:58,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493689261] [2020-12-09 17:36:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 17:36:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:58,586 INFO L348 Elim1Store]: treesize reduction 13, result has 76.4 percent of original size [2020-12-09 17:36:58,586 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 47 [2020-12-09 17:36:58,588 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:36:58,621 INFO L625 ElimStorePlain]: treesize reduction 20, result has 60.0 percent of original size [2020-12-09 17:36:58,623 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:36:58,623 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:9 [2020-12-09 17:36:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:58,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493689261] [2020-12-09 17:36:58,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:58,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:58,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702841135] [2020-12-09 17:36:58,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:36:58,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:36:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:36:58,642 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand 4 states. [2020-12-09 17:36:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:59,169 INFO L93 Difference]: Finished difference Result 318 states and 385 transitions. [2020-12-09 17:36:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:36:59,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:36:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:59,171 INFO L225 Difference]: With dead ends: 318 [2020-12-09 17:36:59,171 INFO L226 Difference]: Without dead ends: 318 [2020-12-09 17:36:59,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:36:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-09 17:36:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 247. [2020-12-09 17:36:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-09 17:36:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 336 transitions. [2020-12-09 17:36:59,176 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 336 transitions. Word has length 8 [2020-12-09 17:36:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:59,176 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 336 transitions. [2020-12-09 17:36:59,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:36:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 336 transitions. [2020-12-09 17:36:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:36:59,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:59,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:59,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 17:36:59,378 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:59,380 INFO L82 PathProgramCache]: Analyzing trace with hash 874371854, now seen corresponding path program 1 times [2020-12-09 17:36:59,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:59,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932201537] [2020-12-09 17:36:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:36:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:59,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:59,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932201537] [2020-12-09 17:36:59,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:59,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:36:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041594618] [2020-12-09 17:36:59,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:36:59,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:36:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:36:59,474 INFO L87 Difference]: Start difference. First operand 247 states and 336 transitions. Second operand 3 states. [2020-12-09 17:36:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:36:59,493 INFO L93 Difference]: Finished difference Result 335 states and 418 transitions. [2020-12-09 17:36:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:36:59,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 17:36:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:36:59,495 INFO L225 Difference]: With dead ends: 335 [2020-12-09 17:36:59,495 INFO L226 Difference]: Without dead ends: 335 [2020-12-09 17:36:59,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:36:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-12-09 17:36:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 249. [2020-12-09 17:36:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-09 17:36:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 336 transitions. [2020-12-09 17:36:59,500 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 336 transitions. Word has length 9 [2020-12-09 17:36:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:36:59,500 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 336 transitions. [2020-12-09 17:36:59,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:36:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 336 transitions. [2020-12-09 17:36:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:36:59,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:36:59,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:36:59,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 17:36:59,702 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:36:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:36:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1335722412, now seen corresponding path program 1 times [2020-12-09 17:36:59,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:36:59,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108840990] [2020-12-09 17:36:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 17:36:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:36:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:36:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:36:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:36:59,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:36:59,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108840990] [2020-12-09 17:36:59,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:36:59,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:36:59,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773233640] [2020-12-09 17:36:59,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:36:59,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:36:59,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:36:59,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:36:59,884 INFO L87 Difference]: Start difference. First operand 249 states and 336 transitions. Second operand 3 states. [2020-12-09 17:37:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:00,115 INFO L93 Difference]: Finished difference Result 298 states and 387 transitions. [2020-12-09 17:37:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:37:00,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 17:37:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:00,117 INFO L225 Difference]: With dead ends: 298 [2020-12-09 17:37:00,117 INFO L226 Difference]: Without dead ends: 291 [2020-12-09 17:37:00,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:37:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-09 17:37:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 246. [2020-12-09 17:37:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-09 17:37:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 331 transitions. [2020-12-09 17:37:00,121 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 331 transitions. Word has length 10 [2020-12-09 17:37:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:00,121 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 331 transitions. [2020-12-09 17:37:00,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:37:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 331 transitions. [2020-12-09 17:37:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:37:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:00,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:00,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 17:37:00,323 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:00,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1276655561, now seen corresponding path program 1 times [2020-12-09 17:37:00,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:00,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154273250] [2020-12-09 17:37:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 17:37:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:00,407 INFO L382 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 [2020-12-09 17:37:00,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:00,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:00,410 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:00,410 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 17:37:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:00,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:00,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154273250] [2020-12-09 17:37:00,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:00,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:37:00,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713652014] [2020-12-09 17:37:00,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:37:00,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:00,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:37:00,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:37:00,419 INFO L87 Difference]: Start difference. First operand 246 states and 331 transitions. Second operand 3 states. [2020-12-09 17:37:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:00,674 INFO L93 Difference]: Finished difference Result 334 states and 426 transitions. [2020-12-09 17:37:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:37:00,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-09 17:37:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:00,676 INFO L225 Difference]: With dead ends: 334 [2020-12-09 17:37:00,676 INFO L226 Difference]: Without dead ends: 334 [2020-12-09 17:37:00,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:37:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-09 17:37:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2020-12-09 17:37:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-09 17:37:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 325 transitions. [2020-12-09 17:37:00,680 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 325 transitions. Word has length 13 [2020-12-09 17:37:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:00,680 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 325 transitions. [2020-12-09 17:37:00,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:37:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 325 transitions. [2020-12-09 17:37:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:37:00,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:00,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:00,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 17:37:00,881 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1276655560, now seen corresponding path program 1 times [2020-12-09 17:37:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:00,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579876502] [2020-12-09 17:37:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:37:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:00,947 INFO L382 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 [2020-12-09 17:37:00,948 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:00,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:00,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:00,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 17:37:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:00,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579876502] [2020-12-09 17:37:00,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:00,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:37:00,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102046649] [2020-12-09 17:37:00,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:37:00,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:37:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:00,973 INFO L87 Difference]: Start difference. First operand 243 states and 325 transitions. Second operand 4 states. [2020-12-09 17:37:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:01,571 INFO L93 Difference]: Finished difference Result 434 states and 524 transitions. [2020-12-09 17:37:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:37:01,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 17:37:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:01,573 INFO L225 Difference]: With dead ends: 434 [2020-12-09 17:37:01,573 INFO L226 Difference]: Without dead ends: 434 [2020-12-09 17:37:01,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-09 17:37:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 246. [2020-12-09 17:37:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-09 17:37:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 327 transitions. [2020-12-09 17:37:01,578 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 327 transitions. Word has length 13 [2020-12-09 17:37:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:01,578 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 327 transitions. [2020-12-09 17:37:01,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:37:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 327 transitions. [2020-12-09 17:37:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:37:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:01,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:01,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 17:37:01,779 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:01,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1828866963, now seen corresponding path program 1 times [2020-12-09 17:37:01,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:01,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223239091] [2020-12-09 17:37:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:01,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 17:37:01,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:01,980 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:01,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2020-12-09 17:37:01,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:01,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:02,000 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:02,002 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:02,003 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 13 [2020-12-09 17:37:02,004 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:02,013 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:02,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:02,014 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:13 [2020-12-09 17:37:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:02,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:02,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223239091] [2020-12-09 17:37:02,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:02,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 17:37:02,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973412858] [2020-12-09 17:37:02,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:37:02,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:37:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:37:02,057 INFO L87 Difference]: Start difference. First operand 246 states and 327 transitions. Second operand 8 states. [2020-12-09 17:37:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:02,820 INFO L93 Difference]: Finished difference Result 348 states and 443 transitions. [2020-12-09 17:37:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:37:02,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-09 17:37:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:02,822 INFO L225 Difference]: With dead ends: 348 [2020-12-09 17:37:02,823 INFO L226 Difference]: Without dead ends: 348 [2020-12-09 17:37:02,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:37:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-09 17:37:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 285. [2020-12-09 17:37:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-09 17:37:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 385 transitions. [2020-12-09 17:37:02,827 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 385 transitions. Word has length 14 [2020-12-09 17:37:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:02,828 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 385 transitions. [2020-12-09 17:37:02,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:37:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 385 transitions. [2020-12-09 17:37:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:37:02,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:02,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:03,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 17:37:03,029 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:03,029 INFO L82 PathProgramCache]: Analyzing trace with hash -921616701, now seen corresponding path program 1 times [2020-12-09 17:37:03,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:03,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462134255] [2020-12-09 17:37:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:37:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:03,112 INFO L382 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 [2020-12-09 17:37:03,113 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:03,117 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:03,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:03,118 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 17:37:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:03,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:03,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462134255] [2020-12-09 17:37:03,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:03,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:37:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482545895] [2020-12-09 17:37:03,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:37:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:37:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:03,141 INFO L87 Difference]: Start difference. First operand 285 states and 385 transitions. Second operand 4 states. [2020-12-09 17:37:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:03,712 INFO L93 Difference]: Finished difference Result 472 states and 580 transitions. [2020-12-09 17:37:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:37:03,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 17:37:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:03,716 INFO L225 Difference]: With dead ends: 472 [2020-12-09 17:37:03,716 INFO L226 Difference]: Without dead ends: 472 [2020-12-09 17:37:03,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-12-09 17:37:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 287. [2020-12-09 17:37:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 17:37:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 387 transitions. [2020-12-09 17:37:03,720 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 387 transitions. Word has length 14 [2020-12-09 17:37:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:03,721 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 387 transitions. [2020-12-09 17:37:03,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:37:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 387 transitions. [2020-12-09 17:37:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:37:03,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:03,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:03,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 17:37:03,923 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:03,924 INFO L82 PathProgramCache]: Analyzing trace with hash -921559075, now seen corresponding path program 1 times [2020-12-09 17:37:03,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:03,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139035014] [2020-12-09 17:37:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:37:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:04,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139035014] [2020-12-09 17:37:04,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:04,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 17:37:04,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970453296] [2020-12-09 17:37:04,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:37:04,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:04,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:37:04,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:37:04,060 INFO L87 Difference]: Start difference. First operand 287 states and 387 transitions. Second operand 6 states. [2020-12-09 17:37:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:04,140 INFO L93 Difference]: Finished difference Result 313 states and 383 transitions. [2020-12-09 17:37:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 17:37:04,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 17:37:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:04,142 INFO L225 Difference]: With dead ends: 313 [2020-12-09 17:37:04,142 INFO L226 Difference]: Without dead ends: 313 [2020-12-09 17:37:04,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:37:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-12-09 17:37:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 277. [2020-12-09 17:37:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-09 17:37:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 371 transitions. [2020-12-09 17:37:04,146 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 371 transitions. Word has length 14 [2020-12-09 17:37:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:04,146 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 371 transitions. [2020-12-09 17:37:04,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:37:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 371 transitions. [2020-12-09 17:37:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 17:37:04,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:04,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:04,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 17:37:04,348 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 907167230, now seen corresponding path program 1 times [2020-12-09 17:37:04,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:04,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316803791] [2020-12-09 17:37:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:37:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:04,483 INFO L348 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2020-12-09 17:37:04,483 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 41 [2020-12-09 17:37:04,485 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:04,507 INFO L625 ElimStorePlain]: treesize reduction 12, result has 72.1 percent of original size [2020-12-09 17:37:04,508 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:37:04,509 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:37:04,510 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:37:04,511 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 17:37:04,511 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:33 [2020-12-09 17:37:04,512 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:37:04,513 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-09 17:37:04,513 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-09 17:37:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:04,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316803791] [2020-12-09 17:37:04,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:04,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:37:04,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283703367] [2020-12-09 17:37:04,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:37:04,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:04,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:37:04,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:04,535 INFO L87 Difference]: Start difference. First operand 277 states and 371 transitions. Second operand 4 states. [2020-12-09 17:37:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:05,091 INFO L93 Difference]: Finished difference Result 437 states and 553 transitions. [2020-12-09 17:37:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:37:05,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 17:37:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:05,093 INFO L225 Difference]: With dead ends: 437 [2020-12-09 17:37:05,094 INFO L226 Difference]: Without dead ends: 437 [2020-12-09 17:37:05,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:37:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-12-09 17:37:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 276. [2020-12-09 17:37:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-09 17:37:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 367 transitions. [2020-12-09 17:37:05,100 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 367 transitions. Word has length 16 [2020-12-09 17:37:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:05,100 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 367 transitions. [2020-12-09 17:37:05,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:37:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 367 transitions. [2020-12-09 17:37:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 17:37:05,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:05,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:05,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 17:37:05,302 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 907167231, now seen corresponding path program 1 times [2020-12-09 17:37:05,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:05,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546013358] [2020-12-09 17:37:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 17:37:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:05,460 INFO L348 Elim1Store]: treesize reduction 13, result has 76.4 percent of original size [2020-12-09 17:37:05,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 47 [2020-12-09 17:37:05,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:05,497 INFO L625 ElimStorePlain]: treesize reduction 20, result has 60.0 percent of original size [2020-12-09 17:37:05,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:05,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:9 [2020-12-09 17:37:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:05,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:05,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546013358] [2020-12-09 17:37:05,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:05,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:37:05,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651263424] [2020-12-09 17:37:05,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:37:05,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:05,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:37:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:05,524 INFO L87 Difference]: Start difference. First operand 276 states and 367 transitions. Second operand 4 states. [2020-12-09 17:37:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:05,922 INFO L93 Difference]: Finished difference Result 313 states and 379 transitions. [2020-12-09 17:37:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:37:05,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 17:37:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:05,924 INFO L225 Difference]: With dead ends: 313 [2020-12-09 17:37:05,924 INFO L226 Difference]: Without dead ends: 313 [2020-12-09 17:37:05,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:37:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-12-09 17:37:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 276. [2020-12-09 17:37:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-09 17:37:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 359 transitions. [2020-12-09 17:37:05,928 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 359 transitions. Word has length 16 [2020-12-09 17:37:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:05,928 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 359 transitions. [2020-12-09 17:37:05,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:37:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 359 transitions. [2020-12-09 17:37:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:37:05,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:05,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:06,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-12-09 17:37:06,130 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40REQUIRES_VIOLATION, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 17:37:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1447447789, now seen corresponding path program 1 times [2020-12-09 17:37:06,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:06,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145469632] [2020-12-09 17:37:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 17:37:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:06,441 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:06,445 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:06,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2020-12-09 17:37:06,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:06,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:06,460 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:06,461 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:06,462 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 13 [2020-12-09 17:37:06,463 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:06,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:06,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:06,469 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:15 [2020-12-09 17:37:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:06,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:06,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145469632] [2020-12-09 17:37:06,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971220266] [2020-12-09 17:37:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:37:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 17:37:06,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:07,022 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:07,027 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2020-12-09 17:37:07,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:07,041 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:07,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 17:37:07,045 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 17:37:07,047 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:07,047 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 24 treesize of output 13 [2020-12-09 17:37:07,049 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 17:37:07,056 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:37:07,056 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:37:07,057 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:15 [2020-12-09 17:37:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:07,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:07,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697441506] [2020-12-09 17:37:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab601ac9-4116-46c7-90a2-9cd87874a090/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:37:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:37:07,152 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:37:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:37:07,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:37:07,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt [2020-12-09 17:37:07,823 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [1145469632] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [697441506] failed with TRACE_FEASIBLE at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:326) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:37:07,826 INFO L168 Benchmark]: Toolchain (without parser) took 16969.13 ms. Allocated memory was 62.9 MB in the beginning and 100.7 MB in the end (delta: 37.7 MB). Free memory was 43.1 MB in the beginning and 77.8 MB in the end (delta: -34.7 MB). Peak memory consumption was 59.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:07,826 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 62.9 MB. Free memory is still 46.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:37:07,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.31 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 42.9 MB in the beginning and 59.0 MB in the end (delta: -16.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:07,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.96 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 56.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:07,827 INFO L168 Benchmark]: Boogie Preprocessor took 30.78 ms. Allocated memory is still 83.9 MB. Free memory was 56.2 MB in the beginning and 53.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:07,828 INFO L168 Benchmark]: RCFGBuilder took 722.32 ms. Allocated memory is still 83.9 MB. Free memory was 53.7 MB in the beginning and 52.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:07,828 INFO L168 Benchmark]: TraceAbstraction took 15782.67 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 51.9 MB in the beginning and 77.8 MB in the end (delta: -25.9 MB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:07,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 62.9 MB. Free memory is still 46.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 385.31 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 42.9 MB in the beginning and 59.0 MB in the end (delta: -16.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.96 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 56.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.78 ms. Allocated memory is still 83.9 MB. Free memory was 56.2 MB in the beginning and 53.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 722.32 ms. Allocated memory is still 83.9 MB. Free memory was 53.7 MB in the beginning and 52.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15782.67 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 51.9 MB in the beginning and 77.8 MB in the end (delta: -25.9 MB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [1145469632] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [697441506] failed with TRACE_FEASIBLE de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [1145469632] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [697441506] failed with TRACE_FEASIBLE: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:326) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...