./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43265b9011f518c5ca7acf1a863628988ab06054 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43265b9011f518c5ca7acf1a863628988ab06054 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 02:46:36,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:46:36,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:46:36,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:46:36,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:46:36,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:46:36,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:46:36,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:46:36,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:46:36,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:46:36,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:46:36,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:46:36,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:46:36,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:46:36,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:46:36,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:46:36,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:46:36,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:46:36,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:46:36,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:46:36,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:46:36,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:46:36,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:46:36,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:46:36,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:46:36,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:46:36,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:46:36,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:46:36,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:46:36,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:46:36,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:46:36,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:46:36,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:46:36,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:46:36,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:46:36,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:46:36,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:46:36,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:46:36,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:46:36,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:46:36,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:46:36,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 02:46:36,454 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:46:36,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:46:36,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:46:36,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:46:36,468 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:46:36,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:46:36,469 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:46:36,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:46:36,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:46:36,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:46:36,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 02:46:36,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:46:36,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 02:46:36,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:46:36,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:46:36,471 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:46:36,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 02:46:36,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:46:36,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:46:36,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:46:36,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:46:36,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:46:36,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:46:36,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:46:36,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 02:46:36,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:46:36,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 02:46:36,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 02:46:36,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 43265b9011f518c5ca7acf1a863628988ab06054 [2019-11-20 02:46:36,694 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:46:36,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:46:36,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:46:36,719 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:46:36,719 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:46:36,720 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s3if.c [2019-11-20 02:46:36,794 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/6bb938159/20e661b2394242399cc1531a7a13cd4e/FLAG29ff8afd0 [2019-11-20 02:46:37,323 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:46:37,324 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/sv-benchmarks/c/array-fpi/s3if.c [2019-11-20 02:46:37,331 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/6bb938159/20e661b2394242399cc1531a7a13cd4e/FLAG29ff8afd0 [2019-11-20 02:46:37,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/6bb938159/20e661b2394242399cc1531a7a13cd4e [2019-11-20 02:46:37,656 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:46:37,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:46:37,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:46:37,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:46:37,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:46:37,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:46:37" (1/1) ... [2019-11-20 02:46:37,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbf2d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:37, skipping insertion in model container [2019-11-20 02:46:37,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:46:37" (1/1) ... [2019-11-20 02:46:37,677 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:46:37,696 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:46:37,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:46:37,898 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:46:38,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:46:38,021 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:46:38,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38 WrapperNode [2019-11-20 02:46:38,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:46:38,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:46:38,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:46:38,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:46:38,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:46:38,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:46:38,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:46:38,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:46:38,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... [2019-11-20 02:46:38,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:46:38,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:46:38,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:46:38,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:46:38,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:38,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 02:46:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 02:46:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 02:46:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:46:38,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:46:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 02:46:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 02:46:38,486 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:46:38,486 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 02:46:38,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:46:38 BoogieIcfgContainer [2019-11-20 02:46:38,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:46:38,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:46:38,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:46:38,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:46:38,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:46:37" (1/3) ... [2019-11-20 02:46:38,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ff5272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:46:38, skipping insertion in model container [2019-11-20 02:46:38,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:46:38" (2/3) ... [2019-11-20 02:46:38,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ff5272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:46:38, skipping insertion in model container [2019-11-20 02:46:38,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:46:38" (3/3) ... [2019-11-20 02:46:38,497 INFO L109 eAbstractionObserver]: Analyzing ICFG s3if.c [2019-11-20 02:46:38,509 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:46:38,516 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 02:46:38,530 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 02:46:38,592 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:46:38,596 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 02:46:38,597 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:46:38,597 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:46:38,597 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:46:38,598 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:46:38,598 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:46:38,598 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:46:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 02:46:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 02:46:38,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:38,628 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:38,629 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 02:46:38,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:38,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025840555] [2019-11-20 02:46:38,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:38,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025840555] [2019-11-20 02:46:38,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:46:38,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 02:46:38,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070998689] [2019-11-20 02:46:38,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 02:46:38,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 02:46:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 02:46:38,875 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 02:46:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:38,905 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 02:46:38,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 02:46:38,907 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 02:46:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:38,917 INFO L225 Difference]: With dead ends: 29 [2019-11-20 02:46:38,917 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 02:46:38,923 INFO L630 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 [2019-11-20 02:46:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 02:46:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 02:46:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 02:46:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 02:46:38,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 02:46:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:38,973 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 02:46:38,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 02:46:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 02:46:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 02:46:38,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:38,975 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:38,975 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 02:46:38,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:38,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964187261] [2019-11-20 02:46:38,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:39,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964187261] [2019-11-20 02:46:39,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:46:39,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 02:46:39,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921224323] [2019-11-20 02:46:39,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 02:46:39,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 02:46:39,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 02:46:39,057 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-20 02:46:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:39,120 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 02:46:39,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 02:46:39,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 02:46:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:39,121 INFO L225 Difference]: With dead ends: 23 [2019-11-20 02:46:39,121 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 02:46:39,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 02:46:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 02:46:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 02:46:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 02:46:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 02:46:39,126 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 02:46:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:39,127 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 02:46:39,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 02:46:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 02:46:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 02:46:39,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:39,128 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:39,128 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:39,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 02:46:39,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:39,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794674094] [2019-11-20 02:46:39,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:46:39,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794674094] [2019-11-20 02:46:39,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:46:39,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 02:46:39,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869255251] [2019-11-20 02:46:39,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 02:46:39,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 02:46:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 02:46:39,221 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-20 02:46:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:39,294 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-20 02:46:39,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 02:46:39,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 02:46:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:39,296 INFO L225 Difference]: With dead ends: 22 [2019-11-20 02:46:39,296 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 02:46:39,297 INFO L630 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 [2019-11-20 02:46:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 02:46:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-20 02:46:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 02:46:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 02:46:39,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-20 02:46:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:39,310 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 02:46:39,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 02:46:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 02:46:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 02:46:39,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:39,312 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:39,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 02:46:39,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:39,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382894504] [2019-11-20 02:46:39,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:39,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382894504] [2019-11-20 02:46:39,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406424986] [2019-11-20 02:46:39,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:39,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 02:46:39,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:39,916 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:46:39,917 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:39,942 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:39,954 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:46:39,954 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:39,989 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:39,989 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:39,990 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 02:46:40,031 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:46:40,032 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:40,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:40,057 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:40,057 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 02:46:40,331 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:40,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-20 02:46:40,333 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:40,384 INFO L567 ElimStorePlain]: treesize reduction 24, result has 68.8 percent of original size [2019-11-20 02:46:40,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:40,386 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2019-11-20 02:46:40,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:46:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:40,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:40,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-20 02:46:40,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705998905] [2019-11-20 02:46:40,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 02:46:40,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 02:46:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-20 02:46:40,503 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 15 states. [2019-11-20 02:46:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:41,147 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-20 02:46:41,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 02:46:41,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-11-20 02:46:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:41,151 INFO L225 Difference]: With dead ends: 33 [2019-11-20 02:46:41,151 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 02:46:41,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-20 02:46:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 02:46:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-20 02:46:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 02:46:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-20 02:46:41,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-20 02:46:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:41,162 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-20 02:46:41,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 02:46:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-20 02:46:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 02:46:41,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:41,164 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:41,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:41,367 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-20 02:46:41,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:41,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647328431] [2019-11-20 02:46:41,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:41,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647328431] [2019-11-20 02:46:41,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988944048] [2019-11-20 02:46:41,465 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:41,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:46:41,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:41,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:46:41,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:41,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:41,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 02:46:41,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471949163] [2019-11-20 02:46:41,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 02:46:41,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:46:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:46:41,602 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-20 02:46:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:41,843 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 02:46:41,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 02:46:41,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 02:46:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:41,845 INFO L225 Difference]: With dead ends: 31 [2019-11-20 02:46:41,845 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 02:46:41,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:46:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 02:46:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-20 02:46:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 02:46:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-20 02:46:41,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-20 02:46:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:41,853 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-20 02:46:41,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 02:46:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-20 02:46:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 02:46:41,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:41,855 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:42,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:42,068 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-20 02:46:42,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:42,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430241934] [2019-11-20 02:46:42,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:42,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430241934] [2019-11-20 02:46:42,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939136951] [2019-11-20 02:46:42,184 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:42,238 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 02:46:42,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:42,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:46:42,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:42,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:42,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 02:46:42,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540349576] [2019-11-20 02:46:42,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 02:46:42,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:46:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:46:42,296 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-20 02:46:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:42,456 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-20 02:46:42,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 02:46:42,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 02:46:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:42,459 INFO L225 Difference]: With dead ends: 35 [2019-11-20 02:46:42,459 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 02:46:42,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-20 02:46:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 02:46:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-20 02:46:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 02:46:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-20 02:46:42,467 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-20 02:46:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:42,468 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-20 02:46:42,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 02:46:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-20 02:46:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 02:46:42,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:42,470 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:42,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:42,673 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:42,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-20 02:46:42,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:42,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019763838] [2019-11-20 02:46:42,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:43,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019763838] [2019-11-20 02:46:43,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741754251] [2019-11-20 02:46:43,256 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:43,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:46:43,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:43,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 02:46:43,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:43,317 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:46:43,317 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,327 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:43,335 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:46:43,335 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,344 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:43,345 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,345 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 02:46:43,384 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:46:43,385 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,396 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:43,396 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,396 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 02:46:43,490 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:43,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:46:43,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,528 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 02:46:43,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:43,529 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 02:46:43,878 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:43,879 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 103 [2019-11-20 02:46:43,880 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:43,945 INFO L567 ElimStorePlain]: treesize reduction 48, result has 56.0 percent of original size [2019-11-20 02:46:43,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:43,947 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:61 [2019-11-20 02:46:44,240 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:44,240 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 165 [2019-11-20 02:46:44,242 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:44,310 INFO L567 ElimStorePlain]: treesize reduction 190, result has 23.4 percent of original size [2019-11-20 02:46:44,312 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:44,312 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:105, output treesize:50 [2019-11-20 02:46:44,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:46:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:44,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:44,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-11-20 02:46:44,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237518620] [2019-11-20 02:46:44,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 02:46:44,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 02:46:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2019-11-20 02:46:44,445 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 29 states. [2019-11-20 02:46:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:45,868 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-20 02:46:45,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 02:46:45,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 19 [2019-11-20 02:46:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:45,870 INFO L225 Difference]: With dead ends: 43 [2019-11-20 02:46:45,870 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 02:46:45,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 02:46:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 02:46:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-20 02:46:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 02:46:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-20 02:46:45,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-20 02:46:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:45,879 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-20 02:46:45,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 02:46:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-20 02:46:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 02:46:45,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:45,880 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:46,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:46,084 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1189058463, now seen corresponding path program 5 times [2019-11-20 02:46:46,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:46,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841258879] [2019-11-20 02:46:46,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:46,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841258879] [2019-11-20 02:46:46,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385509508] [2019-11-20 02:46:46,179 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:46,225 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 02:46:46,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:46,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:46:46,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:46,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:46,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-20 02:46:46,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704255465] [2019-11-20 02:46:46,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 02:46:46,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 02:46:46,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:46:46,289 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 13 states. [2019-11-20 02:46:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:46,576 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-20 02:46:46,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 02:46:46,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-20 02:46:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:46,578 INFO L225 Difference]: With dead ends: 39 [2019-11-20 02:46:46,578 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 02:46:46,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:46:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 02:46:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-11-20 02:46:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 02:46:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-20 02:46:46,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-20 02:46:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:46,586 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-20 02:46:46,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 02:46:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-20 02:46:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 02:46:46,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:46,587 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:46,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:46,791 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1846717952, now seen corresponding path program 6 times [2019-11-20 02:46:46,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:46,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090867870] [2019-11-20 02:46:46,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:46,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090867870] [2019-11-20 02:46:46,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150284803] [2019-11-20 02:46:46,931 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:46,989 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-20 02:46:46,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:46,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:46:46,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:47,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:47,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-20 02:46:47,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136077207] [2019-11-20 02:46:47,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 02:46:47,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:47,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 02:46:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:46:47,055 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2019-11-20 02:46:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:47,210 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-11-20 02:46:47,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 02:46:47,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-20 02:46:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:47,211 INFO L225 Difference]: With dead ends: 43 [2019-11-20 02:46:47,211 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 02:46:47,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:46:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 02:46:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-20 02:46:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 02:46:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-20 02:46:47,217 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2019-11-20 02:46:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:47,217 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-20 02:46:47,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 02:46:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-20 02:46:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 02:46:47,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:47,218 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:47,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:47,423 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:47,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1106368034, now seen corresponding path program 7 times [2019-11-20 02:46:47,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:47,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884207181] [2019-11-20 02:46:47,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:48,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884207181] [2019-11-20 02:46:48,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994526254] [2019-11-20 02:46:48,112 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:48,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-20 02:46:48,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:48,180 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:46:48,180 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,189 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:48,195 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:46:48,195 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:48,203 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,203 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 02:46:48,262 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:46:48,263 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,274 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:48,274 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,275 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 02:46:48,373 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:48,373 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-11-20 02:46:48,374 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,413 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.0 percent of original size [2019-11-20 02:46:48,414 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,414 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-20 02:46:48,547 INFO L343 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2019-11-20 02:46:48,548 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 treesize of output 98 [2019-11-20 02:46:48,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,596 INFO L567 ElimStorePlain]: treesize reduction 54, result has 47.1 percent of original size [2019-11-20 02:46:48,597 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,597 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2019-11-20 02:46:48,850 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-20 02:46:48,850 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-11-20 02:46:48,851 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:48,892 INFO L567 ElimStorePlain]: treesize reduction 62, result has 48.3 percent of original size [2019-11-20 02:46:48,893 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:48,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:58 [2019-11-20 02:46:49,824 WARN L191 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 02:46:52,358 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 02:46:52,442 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-11-20 02:46:52,443 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 171 [2019-11-20 02:46:52,444 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:52,496 INFO L567 ElimStorePlain]: treesize reduction 114, result has 39.7 percent of original size [2019-11-20 02:46:52,497 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:52,497 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:94, output treesize:75 [2019-11-20 02:46:52,807 INFO L343 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2019-11-20 02:46:52,807 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 173 [2019-11-20 02:46:52,809 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:52,861 INFO L567 ElimStorePlain]: treesize reduction 114, result has 39.7 percent of original size [2019-11-20 02:46:52,861 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:52,862 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:100, output treesize:75 [2019-11-20 02:46:52,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:46:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:53,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:53,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-11-20 02:46:53,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245350981] [2019-11-20 02:46:53,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-20 02:46:53,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-20 02:46:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1082, Unknown=1, NotChecked=0, Total=1190 [2019-11-20 02:46:53,009 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 35 states. [2019-11-20 02:46:54,967 WARN L191 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-11-20 02:46:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:55,489 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-11-20 02:46:55,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 02:46:55,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 24 [2019-11-20 02:46:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:55,491 INFO L225 Difference]: With dead ends: 60 [2019-11-20 02:46:55,491 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 02:46:55,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=247, Invalid=2302, Unknown=1, NotChecked=0, Total=2550 [2019-11-20 02:46:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 02:46:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2019-11-20 02:46:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 02:46:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-20 02:46:55,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2019-11-20 02:46:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:55,501 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-20 02:46:55,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-20 02:46:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-20 02:46:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 02:46:55,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:55,502 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:55,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:55,707 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash -426309664, now seen corresponding path program 1 times [2019-11-20 02:46:55,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:55,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362176112] [2019-11-20 02:46:55,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:55,731 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:46:55,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731271731] [2019-11-20 02:46:55,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:55,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 02:46:55,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:55,820 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:46:55,821 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:55,830 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:55,830 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:55,831 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-20 02:46:55,849 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-20 02:46:55,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:55,856 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:55,856 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:55,856 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-20 02:46:55,908 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:55,909 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-20 02:46:55,909 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:55,936 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-20 02:46:55,936 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:55,936 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2019-11-20 02:46:56,003 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:56,004 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:46:56,006 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:56,028 INFO L567 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2019-11-20 02:46:56,029 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:56,029 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2019-11-20 02:46:56,077 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:56,077 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2019-11-20 02:46:56,077 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:56,087 INFO L567 ElimStorePlain]: treesize reduction 14, result has 33.3 percent of original size [2019-11-20 02:46:56,087 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:56,087 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2019-11-20 02:46:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:46:56,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362176112] [2019-11-20 02:46:56,102 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:46:56,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731271731] [2019-11-20 02:46:56,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:46:56,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-20 02:46:56,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031196963] [2019-11-20 02:46:56,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 02:46:56,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 02:46:56,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-20 02:46:56,104 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-11-20 02:46:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:56,370 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-20 02:46:56,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 02:46:56,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-20 02:46:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:56,371 INFO L225 Difference]: With dead ends: 46 [2019-11-20 02:46:56,371 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 02:46:56,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:46:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 02:46:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-20 02:46:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-20 02:46:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-20 02:46:56,381 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2019-11-20 02:46:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:56,381 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-20 02:46:56,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 02:46:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-20 02:46:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 02:46:56,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:56,383 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:56,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:56,587 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1700299324, now seen corresponding path program 8 times [2019-11-20 02:46:56,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:56,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953615786] [2019-11-20 02:46:56,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:56,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953615786] [2019-11-20 02:46:56,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390197045] [2019-11-20 02:46:56,690 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:46:56,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:46:56,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:56,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:46:56,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:56,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:56,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-20 02:46:56,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764546650] [2019-11-20 02:46:56,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 02:46:56,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 02:46:56,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:46:56,817 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 16 states. [2019-11-20 02:46:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:57,114 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-11-20 02:46:57,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 02:46:57,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-20 02:46:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:57,116 INFO L225 Difference]: With dead ends: 47 [2019-11-20 02:46:57,116 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 02:46:57,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-11-20 02:46:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 02:46:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-20 02:46:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 02:46:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-20 02:46:57,124 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 26 [2019-11-20 02:46:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:57,124 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-20 02:46:57,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 02:46:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-20 02:46:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 02:46:57,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:57,126 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:57,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:57,327 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1307941697, now seen corresponding path program 9 times [2019-11-20 02:46:57,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:57,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369356366] [2019-11-20 02:46:57,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:57,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369356366] [2019-11-20 02:46:57,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959349019] [2019-11-20 02:46:57,437 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:57,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 02:46:57,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:57,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:46:57,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:57,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:46:57,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-20 02:46:57,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140135968] [2019-11-20 02:46:57,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 02:46:57,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:46:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 02:46:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:46:57,625 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 16 states. [2019-11-20 02:46:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:46:57,842 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-11-20 02:46:57,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 02:46:57,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-11-20 02:46:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:46:57,844 INFO L225 Difference]: With dead ends: 51 [2019-11-20 02:46:57,844 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 02:46:57,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-20 02:46:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 02:46:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-20 02:46:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 02:46:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-20 02:46:57,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-20 02:46:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:46:57,852 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-20 02:46:57,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 02:46:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-20 02:46:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 02:46:57,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:46:57,853 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:46:58,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:58,066 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:46:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:46:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 311885347, now seen corresponding path program 10 times [2019-11-20 02:46:58,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:46:58,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555105967] [2019-11-20 02:46:58,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:46:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:46:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:46:59,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555105967] [2019-11-20 02:46:59,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473723598] [2019-11-20 02:46:59,364 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:46:59,416 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:46:59,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:46:59,418 WARN L253 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-20 02:46:59,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:46:59,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:46:59,428 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,437 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:59,441 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:46:59,441 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,449 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:59,449 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,449 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 02:46:59,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:46:59,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,501 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:59,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,502 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 02:46:59,656 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:59,657 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:46:59,657 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,693 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 02:46:59,693 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:59,694 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 02:46:59,920 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:46:59,921 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 138 [2019-11-20 02:46:59,922 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:46:59,977 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 02:46:59,978 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:46:59,978 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 02:47:00,223 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:00,223 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-11-20 02:47:00,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:00,306 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 02:47:00,307 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:00,307 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 02:47:01,492 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:01,492 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 243 [2019-11-20 02:47:01,494 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:01,588 INFO L567 ElimStorePlain]: treesize reduction 240, result has 29.6 percent of original size [2019-11-20 02:47:01,588 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:01,589 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:101 [2019-11-20 02:47:02,019 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2019-11-20 02:47:02,020 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:02,020 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 337 [2019-11-20 02:47:02,022 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:02,172 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2019-11-20 02:47:02,173 INFO L567 ElimStorePlain]: treesize reduction 312, result has 27.6 percent of original size [2019-11-20 02:47:02,174 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:02,174 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:142, output treesize:119 [2019-11-20 02:47:02,726 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-11-20 02:47:02,727 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:02,727 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 120 treesize of output 449 [2019-11-20 02:47:02,729 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:02,906 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2019-11-20 02:47:02,906 INFO L567 ElimStorePlain]: treesize reduction 272, result has 33.2 percent of original size [2019-11-20 02:47:02,907 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:02,907 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:160, output treesize:135 [2019-11-20 02:47:03,946 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-20 02:47:03,946 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:03,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 575 [2019-11-20 02:47:03,950 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:04,221 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 63 [2019-11-20 02:47:04,222 INFO L567 ElimStorePlain]: treesize reduction 620, result has 16.1 percent of original size [2019-11-20 02:47:04,402 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:04,402 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:179, output treesize:104 [2019-11-20 02:47:04,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:47:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:47:04,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:47:04,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-11-20 02:47:04,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529146916] [2019-11-20 02:47:04,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-20 02:47:04,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:04,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-20 02:47:04,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 02:47:04,786 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 47 states. [2019-11-20 02:47:06,561 WARN L191 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-20 02:47:07,700 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2019-11-20 02:47:08,039 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2019-11-20 02:47:08,541 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2019-11-20 02:47:09,002 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2019-11-20 02:47:09,601 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2019-11-20 02:47:10,414 WARN L191 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2019-11-20 02:47:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:14,227 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2019-11-20 02:47:14,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-20 02:47:14,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 29 [2019-11-20 02:47:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:14,228 INFO L225 Difference]: With dead ends: 89 [2019-11-20 02:47:14,229 INFO L226 Difference]: Without dead ends: 70 [2019-11-20 02:47:14,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=777, Invalid=7055, Unknown=0, NotChecked=0, Total=7832 [2019-11-20 02:47:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-20 02:47:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2019-11-20 02:47:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 02:47:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2019-11-20 02:47:14,273 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 29 [2019-11-20 02:47:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:14,274 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2019-11-20 02:47:14,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-20 02:47:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2019-11-20 02:47:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 02:47:14,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:14,281 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:14,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:14,488 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash 936698307, now seen corresponding path program 2 times [2019-11-20 02:47:14,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:14,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909301798] [2019-11-20 02:47:14,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:14,496 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:47:14,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781309389] [2019-11-20 02:47:14,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:14,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:47:14,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:14,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 02:47:14,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:47:14,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909301798] [2019-11-20 02:47:14,675 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:47:14,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781309389] [2019-11-20 02:47:14,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:47:14,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-20 02:47:14,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984016171] [2019-11-20 02:47:14,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 02:47:14,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 02:47:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:47:14,677 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 13 states. [2019-11-20 02:47:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:14,915 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-20 02:47:14,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 02:47:14,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2019-11-20 02:47:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:14,916 INFO L225 Difference]: With dead ends: 71 [2019-11-20 02:47:14,916 INFO L226 Difference]: Without dead ends: 67 [2019-11-20 02:47:14,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:47:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-20 02:47:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2019-11-20 02:47:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 02:47:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-11-20 02:47:14,929 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 31 [2019-11-20 02:47:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:14,930 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-11-20 02:47:14,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 02:47:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-11-20 02:47:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 02:47:14,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:14,931 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:15,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:15,135 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1393842980, now seen corresponding path program 11 times [2019-11-20 02:47:15,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:15,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529601723] [2019-11-20 02:47:15,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:47:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:47:15,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529601723] [2019-11-20 02:47:15,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698991125] [2019-11-20 02:47:15,251 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:15,325 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 02:47:15,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:15,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 02:47:15,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:47:15,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:47:15,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-20 02:47:15,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726140680] [2019-11-20 02:47:15,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 02:47:15,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 02:47:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:47:15,433 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 19 states. [2019-11-20 02:47:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:15,658 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-20 02:47:15,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 02:47:15,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-11-20 02:47:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:15,659 INFO L225 Difference]: With dead ends: 59 [2019-11-20 02:47:15,659 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 02:47:15,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-20 02:47:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 02:47:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-20 02:47:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 02:47:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-20 02:47:15,669 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-11-20 02:47:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:15,669 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-20 02:47:15,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 02:47:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-20 02:47:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 02:47:15,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:15,670 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:15,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:15,874 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1635696442, now seen corresponding path program 12 times [2019-11-20 02:47:15,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:15,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498740373] [2019-11-20 02:47:15,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:47:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:47:17,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498740373] [2019-11-20 02:47:17,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505801194] [2019-11-20 02:47:17,262 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:17,331 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-20 02:47:17,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:17,333 WARN L253 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-20 02:47:17,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:17,341 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:47:17,341 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,350 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:17,351 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-11-20 02:47:17,397 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:17,397 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:47:17,398 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,406 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:17,407 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:17,407 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2019-11-20 02:47:17,474 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:17,487 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:17,487 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:47:17,488 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,515 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-20 02:47:17,515 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:17,516 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-20 02:47:17,574 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:17,588 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:17,588 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:47:17,589 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,615 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-20 02:47:17,616 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:17,616 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-20 02:47:17,680 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:17,697 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:17,698 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:47:17,698 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,751 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-20 02:47:17,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:17,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-20 02:47:17,850 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:17,886 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:17,886 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:47:17,887 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:17,936 INFO L567 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2019-11-20 02:47:17,936 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:17,937 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:38 [2019-11-20 02:47:18,559 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:18,569 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:18,569 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-20 02:47:18,570 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:18,603 INFO L567 ElimStorePlain]: treesize reduction 32, result has 60.5 percent of original size [2019-11-20 02:47:18,604 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:18,604 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:49 [2019-11-20 02:47:18,904 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:18,907 INFO L343 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2019-11-20 02:47:18,908 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2019-11-20 02:47:18,908 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:18,929 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:18,929 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:18,930 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:42 [2019-11-20 02:47:19,240 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:19,270 INFO L343 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2019-11-20 02:47:19,271 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 75 [2019-11-20 02:47:19,272 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:19,315 INFO L567 ElimStorePlain]: treesize reduction 20, result has 69.7 percent of original size [2019-11-20 02:47:19,316 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:19,316 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:46 [2019-11-20 02:47:19,666 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:19,718 INFO L343 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2019-11-20 02:47:19,718 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2019-11-20 02:47:19,719 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:19,784 INFO L567 ElimStorePlain]: treesize reduction 40, result has 57.9 percent of original size [2019-11-20 02:47:19,784 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:19,784 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:55 [2019-11-20 02:47:20,140 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:20,213 INFO L343 Elim1Store]: treesize reduction 49, result has 63.2 percent of original size [2019-11-20 02:47:20,213 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 159 [2019-11-20 02:47:20,215 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:20,283 INFO L567 ElimStorePlain]: treesize reduction 74, result has 48.6 percent of original size [2019-11-20 02:47:20,284 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:20,284 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:70 [2019-11-20 02:47:20,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:47:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 02:47:20,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:47:20,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 48 [2019-11-20 02:47:20,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122888262] [2019-11-20 02:47:20,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-20 02:47:20,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-20 02:47:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2019-11-20 02:47:20,722 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 48 states. [2019-11-20 02:47:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:25,545 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2019-11-20 02:47:25,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-20 02:47:25,546 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 34 [2019-11-20 02:47:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:25,547 INFO L225 Difference]: With dead ends: 83 [2019-11-20 02:47:25,547 INFO L226 Difference]: Without dead ends: 79 [2019-11-20 02:47:25,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=508, Invalid=7324, Unknown=0, NotChecked=0, Total=7832 [2019-11-20 02:47:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-20 02:47:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2019-11-20 02:47:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 02:47:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-20 02:47:25,563 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 34 [2019-11-20 02:47:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:25,563 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-20 02:47:25,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-20 02:47:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-20 02:47:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 02:47:25,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:25,564 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:25,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:25,768 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1692954744, now seen corresponding path program 3 times [2019-11-20 02:47:25,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:25,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257991091] [2019-11-20 02:47:25,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:25,778 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:47:25,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569117213] [2019-11-20 02:47:25,778 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:25,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 02:47:25,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:25,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 02:47:25,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:25,884 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-20 02:47:25,884 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:25,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:25,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:25,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-11-20 02:47:25,941 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:25,952 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:25,953 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 02:47:25,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:25,993 INFO L567 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-11-20 02:47:25,993 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:25,994 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-11-20 02:47:26,003 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:26,009 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,010 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 02:47:26,011 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,038 INFO L567 ElimStorePlain]: treesize reduction 32, result has 43.9 percent of original size [2019-11-20 02:47:26,038 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:26,038 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-11-20 02:47:26,056 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:26,063 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,064 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 02:47:26,064 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,087 INFO L567 ElimStorePlain]: treesize reduction 32, result has 43.9 percent of original size [2019-11-20 02:47:26,088 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:26,088 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2019-11-20 02:47:26,097 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:26,103 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,104 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 02:47:26,104 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,130 INFO L567 ElimStorePlain]: treesize reduction 24, result has 51.0 percent of original size [2019-11-20 02:47:26,131 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:26,131 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:20 [2019-11-20 02:47:26,148 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,148 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-20 02:47:26,149 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 02:47:26,159 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:47:26,160 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,160 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:16 [2019-11-20 02:47:26,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:47:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-20 02:47:26,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257991091] [2019-11-20 02:47:26,214 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:47:26,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569117213] [2019-11-20 02:47:26,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:47:26,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-20 02:47:26,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709734651] [2019-11-20 02:47:26,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 02:47:26,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:26,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:47:26,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:47:26,217 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2019-11-20 02:47:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:26,424 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2019-11-20 02:47:26,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 02:47:26,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-20 02:47:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:26,425 INFO L225 Difference]: With dead ends: 57 [2019-11-20 02:47:26,425 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 02:47:26,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-11-20 02:47:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 02:47:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-11-20 02:47:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 02:47:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-11-20 02:47:26,438 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 34 [2019-11-20 02:47:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:26,438 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-11-20 02:47:26,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 02:47:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-11-20 02:47:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 02:47:26,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:26,439 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:26,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:26,644 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1979212484, now seen corresponding path program 4 times [2019-11-20 02:47:26,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:26,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925109447] [2019-11-20 02:47:26,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:26,651 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:47:26,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041111841] [2019-11-20 02:47:26,651 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:26,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:47:26,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:26,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 02:47:26,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:26,755 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:47:26,755 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,761 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,762 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,762 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 02:47:26,806 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 02:47:26,807 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,812 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,813 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-20 02:47:26,851 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:26,851 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-20 02:47:26,852 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,885 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-20 02:47:26,885 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:26,885 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-11-20 02:47:31,760 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:31,760 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:47:31,761 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:31,790 INFO L567 ElimStorePlain]: treesize reduction 72, result has 33.3 percent of original size [2019-11-20 02:47:31,790 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:31,790 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:36 [2019-11-20 02:47:32,240 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:32,240 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:47:32,241 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:32,270 INFO L567 ElimStorePlain]: treesize reduction 72, result has 33.3 percent of original size [2019-11-20 02:47:32,270 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:32,270 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:36 [2019-11-20 02:47:32,350 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:32,350 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:47:32,351 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:32,390 INFO L567 ElimStorePlain]: treesize reduction 76, result has 32.1 percent of original size [2019-11-20 02:47:32,391 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:32,391 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:32 [2019-11-20 02:47:32,491 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:32,492 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 54 [2019-11-20 02:47:32,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:32,510 INFO L567 ElimStorePlain]: treesize reduction 27, result has 35.7 percent of original size [2019-11-20 02:47:32,510 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:32,510 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:10 [2019-11-20 02:47:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:47:32,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925109447] [2019-11-20 02:47:32,537 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:47:32,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041111841] [2019-11-20 02:47:32,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:47:32,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-20 02:47:32,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691775164] [2019-11-20 02:47:32,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 02:47:32,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:32,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 02:47:32,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=191, Unknown=3, NotChecked=0, Total=240 [2019-11-20 02:47:32,539 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 16 states. [2019-11-20 02:47:38,742 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 02:47:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:42,388 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2019-11-20 02:47:42,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 02:47:42,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2019-11-20 02:47:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:42,389 INFO L225 Difference]: With dead ends: 57 [2019-11-20 02:47:42,389 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 02:47:42,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=81, Invalid=293, Unknown=6, NotChecked=0, Total=380 [2019-11-20 02:47:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 02:47:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-20 02:47:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 02:47:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-11-20 02:47:42,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 34 [2019-11-20 02:47:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:42,401 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-11-20 02:47:42,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 02:47:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-11-20 02:47:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 02:47:42,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:42,402 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:42,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:42,603 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1893861880, now seen corresponding path program 5 times [2019-11-20 02:47:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:42,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631310840] [2019-11-20 02:47:42,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:42,609 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:47:42,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080855906] [2019-11-20 02:47:42,610 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:42,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 02:47:42,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:42,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 02:47:42,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:42,738 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:47:42,739 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:42,743 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-20 02:47:42,779 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-20 02:47:42,779 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:42,788 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,788 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-20 02:47:42,840 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:42,840 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-20 02:47:42,841 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,868 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-20 02:47:42,869 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,869 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-11-20 02:47:42,948 INFO L343 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2019-11-20 02:47:42,949 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2019-11-20 02:47:42,949 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,959 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:42,960 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:42,960 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 02:47:43,044 INFO L343 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2019-11-20 02:47:43,045 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 99 [2019-11-20 02:47:43,046 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:43,068 INFO L567 ElimStorePlain]: treesize reduction 78, result has 31.0 percent of original size [2019-11-20 02:47:43,068 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:43,069 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:35 [2019-11-20 02:47:43,143 INFO L343 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2019-11-20 02:47:43,144 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 99 [2019-11-20 02:47:43,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:43,169 INFO L567 ElimStorePlain]: treesize reduction 72, result has 32.7 percent of original size [2019-11-20 02:47:43,170 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:43,170 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:31 [2019-11-20 02:47:43,250 INFO L343 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2019-11-20 02:47:43,251 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2019-11-20 02:47:43,251 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:43,263 INFO L567 ElimStorePlain]: treesize reduction 39, result has 15.2 percent of original size [2019-11-20 02:47:43,264 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:43,264 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2019-11-20 02:47:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 02:47:43,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631310840] [2019-11-20 02:47:43,288 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:47:43,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080855906] [2019-11-20 02:47:43,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:47:43,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-20 02:47:43,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146662780] [2019-11-20 02:47:43,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 02:47:43,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 02:47:43,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-11-20 02:47:43,290 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 15 states. [2019-11-20 02:47:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:47:43,711 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-11-20 02:47:43,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 02:47:43,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-11-20 02:47:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:47:43,712 INFO L225 Difference]: With dead ends: 65 [2019-11-20 02:47:43,712 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 02:47:43,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:47:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 02:47:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-11-20 02:47:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 02:47:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-11-20 02:47:43,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2019-11-20 02:47:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:47:43,726 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-11-20 02:47:43,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 02:47:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-11-20 02:47:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 02:47:43,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:47:43,727 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:47:43,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:43,931 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:47:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:47:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash -358448264, now seen corresponding path program 6 times [2019-11-20 02:47:43,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:47:43,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759891671] [2019-11-20 02:47:43,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:47:43,936 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:47:43,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673027647] [2019-11-20 02:47:43,937 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:47:44,069 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-20 02:47:44,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:47:44,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 02:47:44,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:47:44,083 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-20 02:47:44,083 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:44,091 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:44,091 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:44,091 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-20 02:47:44,118 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,121 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:47:44,121 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:44,136 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:44,136 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:44,137 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-20 02:47:44,204 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,205 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,206 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,207 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:44,207 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2019-11-20 02:47:44,208 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:44,220 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:44,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:44,221 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:41 [2019-11-20 02:47:44,539 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,541 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,542 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,543 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,544 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,546 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:44,551 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:44,551 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2019-11-20 02:47:44,552 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:44,571 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:44,571 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:44,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:60 [2019-11-20 02:47:45,514 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:45,516 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:45,517 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:45,518 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:45,519 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:45,520 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:45,576 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:45,577 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 196 [2019-11-20 02:47:45,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:45,654 INFO L567 ElimStorePlain]: treesize reduction 132, result has 35.0 percent of original size [2019-11-20 02:47:45,655 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 02:47:45,655 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:71 [2019-11-20 02:47:50,372 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 02:47:57,778 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,779 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,782 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,783 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,784 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,785 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,786 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,787 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,789 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:47:57,793 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:57,794 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 31 [2019-11-20 02:47:57,794 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:47:57,803 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:47:57,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:47:57,804 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:3 [2019-11-20 02:47:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 02:47:57,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759891671] [2019-11-20 02:47:57,824 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:47:57,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673027647] [2019-11-20 02:47:57,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:47:57,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-20 02:47:57,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073721560] [2019-11-20 02:47:57,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 02:47:57,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:47:57,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 02:47:57,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=161, Unknown=5, NotChecked=0, Total=210 [2019-11-20 02:47:57,826 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 15 states. [2019-11-20 02:48:00,349 WARN L191 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 02:48:03,109 WARN L191 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 02:48:03,706 WARN L191 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2019-11-20 02:48:04,300 WARN L191 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-11-20 02:48:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:48:04,348 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-11-20 02:48:04,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 02:48:04,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-11-20 02:48:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:48:04,349 INFO L225 Difference]: With dead ends: 56 [2019-11-20 02:48:04,349 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 02:48:04,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=84, Invalid=253, Unknown=5, NotChecked=0, Total=342 [2019-11-20 02:48:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 02:48:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 02:48:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 02:48:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-20 02:48:04,359 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 34 [2019-11-20 02:48:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:48:04,360 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-20 02:48:04,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 02:48:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-20 02:48:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 02:48:04,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:48:04,361 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:48:04,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:04,566 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:48:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:48:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -127223707, now seen corresponding path program 13 times [2019-11-20 02:48:04,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:48:04,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547988995] [2019-11-20 02:48:04,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:48:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:04,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547988995] [2019-11-20 02:48:04,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175712649] [2019-11-20 02:48:04,750 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:04,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 02:48:04,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:48:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:04,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:48:04,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-20 02:48:04,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266103188] [2019-11-20 02:48:04,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 02:48:04,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:48:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 02:48:04,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-20 02:48:04,965 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 22 states. [2019-11-20 02:48:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:48:05,196 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2019-11-20 02:48:05,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 02:48:05,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-20 02:48:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:48:05,199 INFO L225 Difference]: With dead ends: 72 [2019-11-20 02:48:05,199 INFO L226 Difference]: Without dead ends: 46 [2019-11-20 02:48:05,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-20 02:48:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-20 02:48:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-11-20 02:48:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 02:48:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-20 02:48:05,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 37 [2019-11-20 02:48:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:48:05,208 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-20 02:48:05,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 02:48:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-20 02:48:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 02:48:05,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:48:05,209 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:48:05,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:05,410 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:48:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:48:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash 639592647, now seen corresponding path program 14 times [2019-11-20 02:48:05,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:48:05,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105606212] [2019-11-20 02:48:05,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:48:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:06,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105606212] [2019-11-20 02:48:06,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493849556] [2019-11-20 02:48:06,737 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:48:06,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:48:06,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:48:06,786 WARN L253 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-20 02:48:06,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:48:06,793 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:48:06,793 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:06,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:06,801 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:06,801 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-20 02:48:06,854 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:06,854 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:48:06,855 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:06,878 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:06,879 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:06,879 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-20 02:48:07,002 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:07,015 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:07,015 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2019-11-20 02:48:07,015 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,046 INFO L567 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2019-11-20 02:48:07,047 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,047 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2019-11-20 02:48:07,174 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:07,206 INFO L343 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2019-11-20 02:48:07,207 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 42 treesize of output 71 [2019-11-20 02:48:07,207 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,242 INFO L567 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2019-11-20 02:48:07,243 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,243 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2019-11-20 02:48:07,386 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:07,437 INFO L343 Elim1Store]: treesize reduction 122, result has 31.5 percent of original size [2019-11-20 02:48:07,438 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 86 [2019-11-20 02:48:07,438 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,479 INFO L567 ElimStorePlain]: treesize reduction 24, result has 71.8 percent of original size [2019-11-20 02:48:07,479 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,479 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2019-11-20 02:48:07,684 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:07,775 INFO L343 Elim1Store]: treesize reduction 210, result has 24.5 percent of original size [2019-11-20 02:48:07,775 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 101 [2019-11-20 02:48:07,776 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,846 INFO L567 ElimStorePlain]: treesize reduction 24, result has 75.3 percent of original size [2019-11-20 02:48:07,847 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:07,847 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2019-11-20 02:48:08,028 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:08,115 INFO L343 Elim1Store]: treesize reduction 316, result has 20.2 percent of original size [2019-11-20 02:48:08,115 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 116 [2019-11-20 02:48:08,116 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:08,173 INFO L567 ElimStorePlain]: treesize reduction 24, result has 78.6 percent of original size [2019-11-20 02:48:08,174 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:08,174 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:88 [2019-11-20 02:48:08,585 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:08,666 INFO L343 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2019-11-20 02:48:08,666 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2019-11-20 02:48:08,668 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:08,733 INFO L567 ElimStorePlain]: treesize reduction 154, result has 36.9 percent of original size [2019-11-20 02:48:08,733 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:08,733 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:107, output treesize:90 [2019-11-20 02:48:09,885 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:10,070 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2019-11-20 02:48:10,071 INFO L343 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2019-11-20 02:48:10,071 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 291 [2019-11-20 02:48:10,073 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:10,170 INFO L567 ElimStorePlain]: treesize reduction 238, result has 29.4 percent of original size [2019-11-20 02:48:10,170 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:10,170 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:126, output treesize:99 [2019-11-20 02:48:10,456 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:10,540 INFO L343 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2019-11-20 02:48:10,541 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2019-11-20 02:48:10,542 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:10,613 INFO L567 ElimStorePlain]: treesize reduction 148, result has 37.3 percent of original size [2019-11-20 02:48:10,614 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:10,614 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:107, output treesize:88 [2019-11-20 02:48:11,184 WARN L191 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 02:48:13,747 WARN L191 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 55 [2019-11-20 02:48:13,776 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:14,048 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2019-11-20 02:48:14,048 INFO L343 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2019-11-20 02:48:14,048 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 293 [2019-11-20 02:48:14,050 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:14,141 INFO L567 ElimStorePlain]: treesize reduction 252, result has 28.2 percent of original size [2019-11-20 02:48:14,141 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:14,142 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:124, output treesize:99 [2019-11-20 02:48:14,414 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:14,493 INFO L343 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2019-11-20 02:48:14,494 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2019-11-20 02:48:14,495 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:14,560 INFO L567 ElimStorePlain]: treesize reduction 152, result has 37.7 percent of original size [2019-11-20 02:48:14,560 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:14,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:107, output treesize:92 [2019-11-20 02:48:15,764 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:48:15,996 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2019-11-20 02:48:15,997 INFO L343 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2019-11-20 02:48:15,997 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2019-11-20 02:48:15,998 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:16,068 INFO L567 ElimStorePlain]: treesize reduction 80, result has 53.8 percent of original size [2019-11-20 02:48:16,068 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:16,069 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:128, output treesize:93 [2019-11-20 02:48:16,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:48:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:16,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:48:16,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 59 [2019-11-20 02:48:16,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572878144] [2019-11-20 02:48:16,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-20 02:48:16,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:48:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-20 02:48:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3239, Unknown=3, NotChecked=0, Total=3422 [2019-11-20 02:48:16,293 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 59 states. [2019-11-20 02:48:18,002 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-20 02:48:18,381 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2019-11-20 02:48:21,702 WARN L191 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2019-11-20 02:48:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:48:23,453 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-11-20 02:48:23,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 02:48:23,454 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 39 [2019-11-20 02:48:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:48:23,455 INFO L225 Difference]: With dead ends: 70 [2019-11-20 02:48:23,455 INFO L226 Difference]: Without dead ends: 66 [2019-11-20 02:48:23,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=410, Invalid=6897, Unknown=3, NotChecked=0, Total=7310 [2019-11-20 02:48:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-20 02:48:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2019-11-20 02:48:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-20 02:48:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-11-20 02:48:23,470 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 39 [2019-11-20 02:48:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:48:23,471 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-11-20 02:48:23,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-20 02:48:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-11-20 02:48:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 02:48:23,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:48:23,472 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:48:23,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:23,673 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:48:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:48:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1319651017, now seen corresponding path program 7 times [2019-11-20 02:48:23,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:48:23,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475372455] [2019-11-20 02:48:23,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:48:23,681 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 02:48:23,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062389862] [2019-11-20 02:48:23,681 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:23,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-20 02:48:23,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:48:23,748 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:48:23,749 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:23,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:23,753 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:23,753 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-20 02:48:23,794 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-20 02:48:23,794 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:23,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:23,801 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:23,801 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-20 02:48:23,858 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:23,859 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-20 02:48:23,859 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:23,880 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-11-20 02:48:23,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:23,880 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2019-11-20 02:48:23,944 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:23,945 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:48:23,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:23,969 INFO L567 ElimStorePlain]: treesize reduction 88, result has 26.1 percent of original size [2019-11-20 02:48:23,969 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:23,970 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2019-11-20 02:48:24,021 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:24,021 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:48:24,022 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:24,046 INFO L567 ElimStorePlain]: treesize reduction 72, result has 30.1 percent of original size [2019-11-20 02:48:24,046 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:24,046 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2019-11-20 02:48:24,092 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:24,092 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:48:24,093 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:24,115 INFO L567 ElimStorePlain]: treesize reduction 88, result has 26.1 percent of original size [2019-11-20 02:48:24,116 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:24,116 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2019-11-20 02:48:24,162 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:24,162 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2019-11-20 02:48:24,163 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:24,187 INFO L567 ElimStorePlain]: treesize reduction 72, result has 30.1 percent of original size [2019-11-20 02:48:24,187 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:24,188 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2019-11-20 02:48:24,247 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:24,247 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2019-11-20 02:48:24,247 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:24,256 INFO L567 ElimStorePlain]: treesize reduction 14, result has 33.3 percent of original size [2019-11-20 02:48:24,257 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:24,257 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2019-11-20 02:48:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:48:24,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475372455] [2019-11-20 02:48:24,293 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 02:48:24,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062389862] [2019-11-20 02:48:24,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:48:24,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-20 02:48:24,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536775936] [2019-11-20 02:48:24,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 02:48:24,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:48:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 02:48:24,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-11-20 02:48:24,296 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 17 states. [2019-11-20 02:48:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:48:24,775 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-11-20 02:48:24,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 02:48:24,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-20 02:48:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:48:24,776 INFO L225 Difference]: With dead ends: 70 [2019-11-20 02:48:24,776 INFO L226 Difference]: Without dead ends: 61 [2019-11-20 02:48:24,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-11-20 02:48:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-20 02:48:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-20 02:48:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-20 02:48:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-11-20 02:48:24,791 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2019-11-20 02:48:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:48:24,791 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-11-20 02:48:24,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 02:48:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-11-20 02:48:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 02:48:24,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:48:24,792 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:48:24,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:24,995 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:48:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:48:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1184266071, now seen corresponding path program 15 times [2019-11-20 02:48:24,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:48:24,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954196076] [2019-11-20 02:48:24,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:48:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:25,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954196076] [2019-11-20 02:48:25,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599726710] [2019-11-20 02:48:25,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:25,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-20 02:48:25,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:48:25,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:48:25,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:48:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:25,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:48:25,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-11-20 02:48:25,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562736615] [2019-11-20 02:48:25,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 02:48:25,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:48:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 02:48:25,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2019-11-20 02:48:25,426 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 25 states. [2019-11-20 02:48:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:48:26,007 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2019-11-20 02:48:26,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 02:48:26,008 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2019-11-20 02:48:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:48:26,008 INFO L225 Difference]: With dead ends: 76 [2019-11-20 02:48:26,008 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 02:48:26,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 02:48:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 02:48:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2019-11-20 02:48:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 02:48:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-11-20 02:48:26,018 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 41 [2019-11-20 02:48:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:48:26,018 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-11-20 02:48:26,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 02:48:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-11-20 02:48:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 02:48:26,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:48:26,019 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:48:26,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:26,220 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:48:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:48:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1126332488, now seen corresponding path program 16 times [2019-11-20 02:48:26,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:48:26,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878297240] [2019-11-20 02:48:26,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:48:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:26,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878297240] [2019-11-20 02:48:26,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50869148] [2019-11-20 02:48:26,425 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:26,487 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:48:26,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:48:26,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:48:26,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:48:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:26,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:48:26,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2019-11-20 02:48:26,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9087389] [2019-11-20 02:48:26,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 02:48:26,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:48:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 02:48:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-20 02:48:26,627 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 25 states. [2019-11-20 02:48:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:48:26,895 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2019-11-20 02:48:26,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 02:48:26,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2019-11-20 02:48:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:48:26,896 INFO L225 Difference]: With dead ends: 80 [2019-11-20 02:48:26,896 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 02:48:26,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2019-11-20 02:48:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 02:48:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-11-20 02:48:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-20 02:48:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-11-20 02:48:26,908 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2019-11-20 02:48:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:48:26,908 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-11-20 02:48:26,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 02:48:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-11-20 02:48:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-20 02:48:26,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:48:26,909 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:48:27,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:27,109 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:48:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:48:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -70138730, now seen corresponding path program 17 times [2019-11-20 02:48:27,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:48:27,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512939241] [2019-11-20 02:48:27,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:48:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:48:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:48:28,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512939241] [2019-11-20 02:48:28,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128482593] [2019-11-20 02:48:28,603 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:48:28,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-20 02:48:28,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:48:28,776 WARN L253 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 73 conjunts are in the unsatisfiable core [2019-11-20 02:48:28,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:48:28,792 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:48:28,792 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:28,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:28,805 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:48:28,805 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:28,813 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:28,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:28,813 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 02:48:28,867 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-20 02:48:28,867 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:28,877 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:28,877 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:48:28,877 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-20 02:48:29,010 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:29,011 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 72 [2019-11-20 02:48:29,011 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:29,047 INFO L567 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2019-11-20 02:48:29,047 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:29,047 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-20 02:48:29,251 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:29,251 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 138 [2019-11-20 02:48:29,252 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:29,301 INFO L567 ElimStorePlain]: treesize reduction 72, result has 45.9 percent of original size [2019-11-20 02:48:29,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:29,302 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2019-11-20 02:48:29,606 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:29,606 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 220 [2019-11-20 02:48:29,607 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:29,683 INFO L567 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2019-11-20 02:48:29,684 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:29,684 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:77 [2019-11-20 02:48:30,197 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-11-20 02:48:30,198 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:30,198 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 318 [2019-11-20 02:48:30,200 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:30,351 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2019-11-20 02:48:30,352 INFO L567 ElimStorePlain]: treesize reduction 144, result has 39.2 percent of original size [2019-11-20 02:48:30,352 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:30,353 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:93 [2019-11-20 02:48:31,424 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-20 02:48:31,424 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:31,425 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 432 [2019-11-20 02:48:31,426 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:31,557 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2019-11-20 02:48:31,557 INFO L567 ElimStorePlain]: treesize reduction 180, result has 37.7 percent of original size [2019-11-20 02:48:31,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:31,558 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:113, output treesize:109 [2019-11-20 02:48:33,467 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-11-20 02:48:33,468 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:33,468 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 562 [2019-11-20 02:48:33,470 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:33,720 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-11-20 02:48:33,720 INFO L567 ElimStorePlain]: treesize reduction 216, result has 36.7 percent of original size [2019-11-20 02:48:33,721 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:33,721 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:129, output treesize:125 [2019-11-20 02:48:44,591 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2019-11-20 02:48:52,148 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-20 02:48:52,148 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:52,148 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 121 treesize of output 573 [2019-11-20 02:48:52,151 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:52,392 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 73 [2019-11-20 02:48:52,393 INFO L567 ElimStorePlain]: treesize reduction 768, result has 16.2 percent of original size [2019-11-20 02:48:52,393 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:52,394 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:166, output treesize:149 [2019-11-20 02:48:53,232 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-11-20 02:48:53,232 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:53,233 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 140 treesize of output 715 [2019-11-20 02:48:53,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:53,466 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 81 [2019-11-20 02:48:53,467 INFO L567 ElimStorePlain]: treesize reduction 528, result has 22.9 percent of original size [2019-11-20 02:48:53,468 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:53,468 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:190, output treesize:157 [2019-11-20 02:48:53,907 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-20 02:48:54,888 WARN L191 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-20 02:48:54,889 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:54,889 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 143 treesize of output 873 [2019-11-20 02:48:54,896 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:55,270 WARN L191 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 89 [2019-11-20 02:48:55,270 INFO L567 ElimStorePlain]: treesize reduction 1056, result has 14.8 percent of original size [2019-11-20 02:48:55,271 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:55,272 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:198, output treesize:183 [2019-11-20 02:48:56,593 WARN L191 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2019-11-20 02:48:57,312 WARN L191 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2019-11-20 02:48:57,312 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:48:57,313 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 164 treesize of output 1049 [2019-11-20 02:48:57,319 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:48:57,767 WARN L191 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 98 [2019-11-20 02:48:57,767 INFO L567 ElimStorePlain]: treesize reduction 1424, result has 13.1 percent of original size [2019-11-20 02:48:57,768 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 1 xjuncts. [2019-11-20 02:48:57,768 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:224, output treesize:214 [2019-11-20 02:48:58,379 WARN L191 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2019-11-20 02:48:59,163 WARN L191 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-11-20 02:49:02,030 WARN L191 SmtUtils]: Spent 2.57 s on a formula simplification that was a NOOP. DAG size: 110 [2019-11-20 02:49:03,035 WARN L191 SmtUtils]: Spent 993.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-20 02:49:03,036 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:49:03,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 190 treesize of output 1242 [2019-11-20 02:49:03,043 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:49:03,433 WARN L191 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 104 [2019-11-20 02:49:03,434 INFO L567 ElimStorePlain]: treesize reduction 938, result has 18.4 percent of original size [2019-11-20 02:49:03,435 INFO L496 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-2 vars, End of recursive call: 11 dim-0 vars, and 1 xjuncts. [2019-11-20 02:49:03,436 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:255, output treesize:211 [2019-11-20 02:49:05,889 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 108 [2019-11-20 02:49:08,831 WARN L191 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 111 [2019-11-20 02:49:25,013 WARN L191 SmtUtils]: Spent 15.88 s on a formula simplification that was a NOOP. DAG size: 116 [2019-11-20 02:49:26,306 WARN L191 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 367 [2019-11-20 02:49:26,306 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:49:26,307 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 182 treesize of output 1445 [2019-11-20 02:49:26,317 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:49:26,926 WARN L191 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 110 [2019-11-20 02:49:26,927 INFO L567 ElimStorePlain]: treesize reduction 1680, result has 12.1 percent of original size [2019-11-20 02:49:26,928 INFO L496 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: 12 dim-0 vars, and 1 xjuncts. [2019-11-20 02:49:26,928 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 13 variables, input treesize:252, output treesize:231 [2019-11-20 02:49:37,764 WARN L191 SmtUtils]: Spent 9.66 s on a formula simplification that was a NOOP. DAG size: 114 [2019-11-20 02:50:24,699 WARN L191 SmtUtils]: Spent 11.00 s on a formula simplification that was a NOOP. DAG size: 117 [2019-11-20 02:51:33,911 WARN L191 SmtUtils]: Spent 1.14 m on a formula simplification that was a NOOP. DAG size: 123 [2019-11-20 02:51:35,633 WARN L191 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 423 [2019-11-20 02:51:35,633 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:51:35,634 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 1 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 91 case distinctions, treesize of input 197 treesize of output 1667 [2019-11-20 02:51:35,644 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:51:36,196 WARN L191 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 90 [2019-11-20 02:51:36,196 INFO L567 ElimStorePlain]: treesize reduction 1679, result has 9.3 percent of original size [2019-11-20 02:51:36,631 INFO L496 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 1 dim-2 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-11-20 02:51:36,631 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 17 variables, input treesize:275, output treesize:140 [2019-11-20 02:56:59,113 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-20 02:56:59,114 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: SMTLIBException [2019-11-20 02:56:59,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:59,315 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:576) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 42 more [2019-11-20 02:56:59,318 INFO L168 Benchmark]: Toolchain (without parser) took 621660.25 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 264.2 MB). Free memory was 950.1 MB in the beginning and 859.9 MB in the end (delta: 90.2 MB). Peak memory consumption was 354.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:59,318 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:59,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:59,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:59,319 INFO L168 Benchmark]: Boogie Preprocessor took 31.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:59,319 INFO L168 Benchmark]: RCFGBuilder took 390.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:59,319 INFO L168 Benchmark]: TraceAbstraction took 620828.12 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 112.2 MB). Free memory was 1.1 GB in the beginning and 859.9 MB in the end (delta: 263.2 MB). Peak memory consumption was 375.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:59,320 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 363.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 390.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 620828.12 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 112.2 MB). Free memory was 1.1 GB in the beginning and 859.9 MB in the end (delta: 263.2 MB). Peak memory consumption was 375.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 02:57:00,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:57:00,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:57:00,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:57:00,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:57:00,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:57:00,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:57:00,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:57:00,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:57:00,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:57:00,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:57:00,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:57:00,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:57:00,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:57:00,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:57:00,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:57:00,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:57:00,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:57:00,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:57:00,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:57:00,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:57:00,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:57:00,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:57:00,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:57:00,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:57:00,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:57:00,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:57:00,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:57:00,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:57:00,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:57:00,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:57:00,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:57:00,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:57:00,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:57:00,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:57:00,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:57:00,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:57:00,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:57:00,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:57:00,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:57:00,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:57:00,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-20 02:57:00,928 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:57:00,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:57:00,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:57:00,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:57:00,930 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:57:00,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:57:00,931 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:57:00,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:57:00,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:57:00,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 02:57:00,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:57:00,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 02:57:00,932 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 02:57:00,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 02:57:00,933 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:57:00,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:57:00,933 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:57:00,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 02:57:00,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:57:00,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:57:00,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:57:00,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:57:00,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:57:00,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:57:00,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:57:00,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 02:57:00,936 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 02:57:00,936 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 02:57:00,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 02:57:00,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 02:57:00,937 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 43265b9011f518c5ca7acf1a863628988ab06054 [2019-11-20 02:57:01,303 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:57:01,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:57:01,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:57:01,322 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:57:01,323 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:57:01,324 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s3if.c [2019-11-20 02:57:01,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/0bdd5fbc2/0c90029759ed4ecb8669075e9a67fbac/FLAGd6130ba0f [2019-11-20 02:57:01,764 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:57:01,765 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/sv-benchmarks/c/array-fpi/s3if.c [2019-11-20 02:57:01,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/0bdd5fbc2/0c90029759ed4ecb8669075e9a67fbac/FLAGd6130ba0f [2019-11-20 02:57:02,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/data/0bdd5fbc2/0c90029759ed4ecb8669075e9a67fbac [2019-11-20 02:57:02,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:57:02,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:57:02,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:57:02,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:57:02,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:57:02,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@210ce359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02, skipping insertion in model container [2019-11-20 02:57:02,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,214 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:57:02,228 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:57:02,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:57:02,380 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:57:02,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:57:02,418 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:57:02,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02 WrapperNode [2019-11-20 02:57:02,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:57:02,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:57:02,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:57:02,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:57:02,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:57:02,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:57:02,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:57:02,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:57:02,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... [2019-11-20 02:57:02,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:57:02,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:57:02,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:57:02,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:57:02,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/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 [2019-11-20 02:57:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 02:57:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2019-11-20 02:57:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 02:57:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 02:57:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:57:02,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:57:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2019-11-20 02:57:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 02:57:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 02:57:02,903 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:57:02,903 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 02:57:02,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:57:02 BoogieIcfgContainer [2019-11-20 02:57:02,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:57:02,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:57:02,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:57:02,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:57:02,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:57:02" (1/3) ... [2019-11-20 02:57:02,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d03e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:57:02, skipping insertion in model container [2019-11-20 02:57:02,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:57:02" (2/3) ... [2019-11-20 02:57:02,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d03e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:57:02, skipping insertion in model container [2019-11-20 02:57:02,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:57:02" (3/3) ... [2019-11-20 02:57:02,911 INFO L109 eAbstractionObserver]: Analyzing ICFG s3if.c [2019-11-20 02:57:02,920 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:57:02,926 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 02:57:02,937 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 02:57:02,958 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:57:02,958 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 02:57:02,958 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:57:02,959 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:57:02,959 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:57:02,959 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:57:02,959 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:57:02,959 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:57:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 02:57:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 02:57:02,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:57:02,973 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:57:02,973 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:57:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:57:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 02:57:02,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:57:02,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [176627536] [2019-11-20 02:57:02,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:57:03,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 02:57:03,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:57:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:03,086 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:57:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:03,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [176627536] [2019-11-20 02:57:03,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:57:03,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 02:57:03,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349740655] [2019-11-20 02:57:03,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 02:57:03,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:57:03,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 02:57:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 02:57:03,106 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 02:57:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:57:03,118 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 02:57:03,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 02:57:03,119 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 02:57:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:57:03,127 INFO L225 Difference]: With dead ends: 29 [2019-11-20 02:57:03,127 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 02:57:03,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 02:57:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 02:57:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 02:57:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 02:57:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 02:57:03,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 02:57:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:57:03,158 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 02:57:03,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 02:57:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 02:57:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 02:57:03,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:57:03,159 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:57:03,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:03,360 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:57:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:57:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 02:57:03,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:57:03,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1275125629] [2019-11-20 02:57:03,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:57:03,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 02:57:03,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:57:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:03,461 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:57:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:03,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1275125629] [2019-11-20 02:57:03,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:57:03,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 02:57:03,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003041396] [2019-11-20 02:57:03,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 02:57:03,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:57:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 02:57:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 02:57:03,482 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2019-11-20 02:57:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:57:03,624 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 02:57:03,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 02:57:03,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 02:57:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:57:03,626 INFO L225 Difference]: With dead ends: 23 [2019-11-20 02:57:03,626 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 02:57:03,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 02:57:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 02:57:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 02:57:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 02:57:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 02:57:03,631 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 02:57:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:57:03,632 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 02:57:03,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 02:57:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 02:57:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 02:57:03,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:57:03,633 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:57:03,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:03,844 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:57:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:57:03,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 02:57:03,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:57:03,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [760347113] [2019-11-20 02:57:03,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:57:03,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:57:03,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:57:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:04,033 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:57:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:04,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760347113] [2019-11-20 02:57:04,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:57:04,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 02:57:04,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871462424] [2019-11-20 02:57:04,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 02:57:04,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:57:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:57:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:57:04,155 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2019-11-20 02:57:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:57:04,586 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-20 02:57:04,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 02:57:04,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-20 02:57:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:57:04,587 INFO L225 Difference]: With dead ends: 39 [2019-11-20 02:57:04,588 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 02:57:04,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:57:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 02:57:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-11-20 02:57:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 02:57:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-20 02:57:04,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2019-11-20 02:57:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:57:04,595 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-20 02:57:04,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 02:57:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-20 02:57:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 02:57:04,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:57:04,598 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:57:04,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:04,799 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:57:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:57:04,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 02:57:04,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:57:04,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [956156081] [2019-11-20 02:57:04,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:57:04,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:57:04,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:57:04,964 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 02:57:04,965 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:57:04,987 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:04,994 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:57:04,995 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 02:57:04,999 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2019-11-20 02:57:04,999 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:05,010 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,011 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:28 [2019-11-20 02:57:05,046 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 02:57:05,047 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2019-11-20 02:57:05,049 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,079 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:05,079 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 02:57:05,080 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2019-11-20 02:57:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:05,220 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:57:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:57:05,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [956156081] [2019-11-20 02:57:05,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:57:05,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 6 [2019-11-20 02:57:05,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963747920] [2019-11-20 02:57:05,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:57:05,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:57:05,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:57:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:57:05,289 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2019-11-20 02:57:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:57:05,580 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 02:57:05,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:57:05,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 02:57:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:57:05,597 INFO L225 Difference]: With dead ends: 31 [2019-11-20 02:57:05,597 INFO L226 Difference]: Without dead ends: 22 [2019-11-20 02:57:05,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:57:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-20 02:57:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-20 02:57:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 02:57:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-20 02:57:05,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-20 02:57:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:57:05,608 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-20 02:57:05,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:57:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-20 02:57:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 02:57:05,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:57:05,610 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:57:05,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:05,812 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:57:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:57:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1508379200, now seen corresponding path program 1 times [2019-11-20 02:57:05,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:57:05,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [955387180] [2019-11-20 02:57:05,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:57:05,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:57:05,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:57:05,899 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 02:57:05,899 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,904 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:05,904 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,904 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 02:57:05,953 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-20 02:57:05,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:05,958 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:57:05,958 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-20 02:57:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:05,973 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:57:06,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-20 02:57:06,057 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2019-11-20 02:57:06,058 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:57:06,062 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:06,062 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:57:06,064 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:57:06,065 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:57:06,065 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2019-11-20 02:57:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:57:06,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [955387180] [2019-11-20 02:57:06,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:57:06,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 02:57:06,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531862092] [2019-11-20 02:57:06,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 02:57:06,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:57:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 02:57:06,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 02:57:06,079 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2019-11-20 02:57:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:57:06,195 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-20 02:57:06,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 02:57:06,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-20 02:57:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:57:06,196 INFO L225 Difference]: With dead ends: 23 [2019-11-20 02:57:06,196 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 02:57:06,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 02:57:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 02:57:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 02:57:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 02:57:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 02:57:06,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-20 02:57:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:57:06,198 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:57:06,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 02:57:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 02:57:06,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 02:57:06,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:57:06,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 02:57:06,710 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-11-20 02:57:06,713 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 02:57:06,713 INFO L444 ceAbstractionStarter]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2019-11-20 02:57:06,713 INFO L440 ceAbstractionStarter]: At program point L27-3(lines 27 30) the Hoare annotation is: (let ((.cse4 (select |#memory_int| |ULTIMATE.start_main_~#sum~0.base|)) (.cse5 ((_ sign_extend 32) (_ bv0 32)))) (let ((.cse0 (= (_ bv0 32) ULTIMATE.start_main_~a~0.offset)) (.cse1 (= |ULTIMATE.start_main_~#sum~0.offset| (_ bv0 32))) (.cse2 (= (select .cse4 (bvadd |ULTIMATE.start_main_~#sum~0.offset| (_ bv4 32))) ((_ extract 63 32) .cse5))) (.cse3 (= (select .cse4 |ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse5)))) (or (and .cse0 (= (_ bv0 32) ULTIMATE.start_main_~i~0) .cse1 (not (bvsle ~N~0 (_ bv0 32))) .cse2 .cse3 (not (= ULTIMATE.start_main_~a~0.base |ULTIMATE.start_main_~#sum~0.base|))) (and (= (_ bv3 32) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset)) .cse0 (bvslt (_ bv0 32) ~N~0) .cse1 .cse2 .cse3)))) [2019-11-20 02:57:06,713 INFO L444 ceAbstractionStarter]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2019-11-20 02:57:06,713 INFO L444 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2019-11-20 02:57:06,714 INFO L447 ceAbstractionStarter]: At program point L42(lines 16 43) the Hoare annotation is: true [2019-11-20 02:57:06,714 INFO L444 ceAbstractionStarter]: For program point L34(lines 34 38) no Hoare annotation was computed. [2019-11-20 02:57:06,714 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 02:57:06,714 INFO L444 ceAbstractionStarter]: For program point L32-2(lines 32 39) no Hoare annotation was computed. [2019-11-20 02:57:06,714 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 02:57:06,714 INFO L440 ceAbstractionStarter]: At program point L32-3(lines 32 39) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#sum~0.base|)) (.cse1 ((_ sign_extend 32) (_ bv0 32)))) (and (= (_ bv3 32) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset)) (= (_ bv0 32) ULTIMATE.start_main_~a~0.offset) (= (_ bv0 32) ULTIMATE.start_main_~i~0) (= |ULTIMATE.start_main_~#sum~0.offset| (_ bv0 32)) (not (bvsle ~N~0 (_ bv0 32))) (= (select .cse0 (bvadd |ULTIMATE.start_main_~#sum~0.offset| (_ bv4 32))) ((_ extract 63 32) .cse1)) (= (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse1)))) [2019-11-20 02:57:06,714 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 02:57:06,714 INFO L444 ceAbstractionStarter]: For program point L32-4(lines 32 39) no Hoare annotation was computed. [2019-11-20 02:57:06,715 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-11-20 02:57:06,715 INFO L444 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-20 02:57:06,715 INFO L444 ceAbstractionStarter]: For program point L10-1(line 10) no Hoare annotation was computed. [2019-11-20 02:57:06,715 INFO L444 ceAbstractionStarter]: For program point L10-3(line 10) no Hoare annotation was computed. [2019-11-20 02:57:06,724 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,725 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,725 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,731 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,731 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,732 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,738 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,738 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,738 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,739 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,739 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,745 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,746 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,746 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,746 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,747 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:57:06 BoogieIcfgContainer [2019-11-20 02:57:06,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 02:57:06,758 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:57:06,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:57:06,759 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:57:06,759 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:57:02" (3/4) ... [2019-11-20 02:57:06,762 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 02:57:06,772 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-20 02:57:06,773 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 02:57:06,773 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 02:57:06,849 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c6605812-3efe-4b43-94a5-440838c5da70/bin/uautomizer/witness.graphml [2019-11-20 02:57:06,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:57:06,853 INFO L168 Benchmark]: Toolchain (without parser) took 4653.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 961.8 MB in the beginning and 887.3 MB in the end (delta: 74.5 MB). Peak memory consumption was 194.6 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,853 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:57:06,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.09 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.24 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -165.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,855 INFO L168 Benchmark]: Boogie Preprocessor took 25.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,855 INFO L168 Benchmark]: RCFGBuilder took 376.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,856 INFO L168 Benchmark]: TraceAbstraction took 3852.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 893.8 MB in the end (delta: 198.4 MB). Peak memory consumption was 198.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,856 INFO L168 Benchmark]: Witness Printer took 93.19 ms. Allocated memory is still 1.1 GB. Free memory was 893.8 MB in the beginning and 887.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-20 02:57:06,858 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 218.09 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 82.24 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -165.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 376.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3852.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 893.8 MB in the end (delta: 198.4 MB). Peak memory consumption was 198.4 MB. Max. memory is 11.5 GB. * Witness Printer took 93.19 ms. Allocated memory is still 1.1 GB. Free memory was 893.8 MB in the beginning and 887.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant [2019-11-20 02:57:06,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,867 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,867 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((3bv32 == unknown-#memory_int-unknown[a][a] && 0bv32 == a) && 0bv32 == i) && sum == 0bv32) && !~bvsle32(N, 0bv32)) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0] - InvariantResult [Line: 27]: Loop Invariant [2019-11-20 02:57:06,869 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,869 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,869 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,869 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,870 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,871 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,871 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,871 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,871 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-20 02:57:06,872 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((((0bv32 == a && 0bv32 == i) && sum == 0bv32) && !~bvsle32(N, 0bv32)) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0]) && !(a == sum)) || (((((3bv32 == unknown-#memory_int-unknown[a][a] && 0bv32 == a) && ~bvslt32(0bv32, N)) && sum == 0bv32) && unknown-#memory_int-unknown[sum][~bvadd16(sum, 4bv32)] == ~sign_extendFrom32To64(0bv32)[63:32]) && unknown-#memory_int-unknown[sum][sum] == ~sign_extendFrom32To64(0bv32)[31:0]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 3.7s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 50 SDtfs, 74 SDslu, 29 SDs, 0 SdLazy, 164 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 118 HoareAnnotationTreeSize, 3 FomulaSimplifications, 64 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 97 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 104 ConstructedInterpolants, 5 QuantifiedInterpolants, 7240 SizeOfPredicates, 24 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 6/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...