./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573aabe1a1502adb4c5e6135ed8c30ce3759c991 .................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573aabe1a1502adb4c5e6135ed8c30ce3759c991 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:36:40,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:36:40,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:36:40,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:36:40,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:36:40,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:36:40,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:36:40,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:36:40,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:36:40,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:36:40,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:36:40,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:36:40,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:36:40,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:36:40,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:36:40,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:36:40,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:36:40,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:36:40,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:36:40,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:36:40,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:36:40,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:36:40,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:36:40,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:36:40,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:36:40,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:36:40,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:36:40,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:36:40,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:36:40,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:36:40,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:36:40,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:36:40,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:36:40,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:36:40,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:36:40,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:36:40,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:36:40,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:36:40,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:36:40,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:36:40,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:36:40,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:36:40,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:36:40,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:36:40,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:36:40,656 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:36:40,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:36:40,656 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:36:40,657 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:36:40,657 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:36:40,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:36:40,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:36:40,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:36:40,659 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:36:40,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:36:40,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:36:40,659 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:36:40,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:36:40,660 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:36:40,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:36:40,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:36:40,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:36:40,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:36:40,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:36:40,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:36:40,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:36:40,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:36:40,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:36:40,662 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:36:40,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:36:40,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:36:40,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:36:40,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:36:40,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:36:40,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:36:40,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:36:40,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:36:40,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:36:40,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:36:40,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:36:40,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:36:40,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:36:40,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573aabe1a1502adb4c5e6135ed8c30ce3759c991 [2020-11-30 01:36:40,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:36:40,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:36:40,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:36:40,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:36:40,980 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:36:40,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-30 01:36:41,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/965f9c792/af1dc73639a249fb9a4f83dbac27ed24/FLAGd3b3404e2 [2020-11-30 01:36:41,664 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:36:41,669 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-30 01:36:41,681 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/965f9c792/af1dc73639a249fb9a4f83dbac27ed24/FLAGd3b3404e2 [2020-11-30 01:36:42,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/965f9c792/af1dc73639a249fb9a4f83dbac27ed24 [2020-11-30 01:36:42,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:36:42,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:36:42,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:36:42,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:36:42,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:36:42,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f81d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42, skipping insertion in model container [2020-11-30 01:36:42,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:36:42,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:36:42,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:36:42,262 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:36:42,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:36:42,302 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:36:42,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42 WrapperNode [2020-11-30 01:36:42,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:36:42,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:36:42,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:36:42,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:36:42,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:36:42,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:36:42,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:36:42,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:36:42,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... [2020-11-30 01:36:42,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:36:42,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:36:42,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:36:42,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:36:42,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:36:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:36:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:36:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:36:42,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:36:42,793 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:36:42,793 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-30 01:36:42,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:36:42 BoogieIcfgContainer [2020-11-30 01:36:42,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:36:42,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:36:42,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:36:42,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:36:42,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:36:42" (1/3) ... [2020-11-30 01:36:42,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab5d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:36:42, skipping insertion in model container [2020-11-30 01:36:42,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:42" (2/3) ... [2020-11-30 01:36:42,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab5d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:36:42, skipping insertion in model container [2020-11-30 01:36:42,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:36:42" (3/3) ... [2020-11-30 01:36:42,830 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2020-11-30 01:36:42,841 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:36:42,846 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-30 01:36:42,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-30 01:36:42,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:36:42,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:36:42,885 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:36:42,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:36:42,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:36:42,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:36:42,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:36:42,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:36:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-30 01:36:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:36:42,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:36:42,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:36:42,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:36:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:36:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash 118951587, now seen corresponding path program 1 times [2020-11-30 01:36:42,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:36:42,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620661872] [2020-11-30 01:36:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:36:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:36:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:36:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620661872] [2020-11-30 01:36:43,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:36:43,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:36:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855619860] [2020-11-30 01:36:43,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:36:43,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:36:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:36:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:36:43,102 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-11-30 01:36:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:36:43,122 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-11-30 01:36:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:36:43,123 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-30 01:36:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:36:43,133 INFO L225 Difference]: With dead ends: 57 [2020-11-30 01:36:43,133 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:36:43,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:36:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:36:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:36:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:36:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-30 01:36:43,174 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2020-11-30 01:36:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:36:43,174 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-30 01:36:43,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:36:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-30 01:36:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:36:43,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:36:43,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:36:43,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:36:43,176 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:36:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:36:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash 117507718, now seen corresponding path program 1 times [2020-11-30 01:36:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:36:43,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708185687] [2020-11-30 01:36:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:36:43,198 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:36:43,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835283322] [2020-11-30 01:36:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:36:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:36:43,253 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:36:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:36:43,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:36:43,286 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:36:43,287 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:36:43,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:36:43,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:36:43 BoogieIcfgContainer [2020-11-30 01:36:43,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:36:43,539 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:36:43,539 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:36:43,539 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:36:43,540 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:36:42" (3/4) ... [2020-11-30 01:36:43,542 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:36:43,542 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:36:43,544 INFO L168 Benchmark]: Toolchain (without parser) took 1526.59 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.8 MB in the beginning and 79.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:36:43,545 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 53.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:36:43,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.77 ms. Allocated memory is still 96.5 MB. Free memory was 66.8 MB in the beginning and 73.1 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:36:43,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.83 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:36:43,547 INFO L168 Benchmark]: Boogie Preprocessor took 27.27 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 70.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:36:43,548 INFO L168 Benchmark]: RCFGBuilder took 425.03 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 54.4 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:36:43,549 INFO L168 Benchmark]: TraceAbstraction took 741.32 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 53.8 MB in the beginning and 80.3 MB in the end (delta: -26.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:36:43,550 INFO L168 Benchmark]: Witness Printer took 3.75 ms. Allocated memory is still 117.4 MB. Free memory was 80.3 MB in the beginning and 79.7 MB in the end (delta: 563.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:36:43,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 53.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.77 ms. Allocated memory is still 96.5 MB. Free memory was 66.8 MB in the beginning and 73.1 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.83 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.27 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 70.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 425.03 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 54.4 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 741.32 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 53.8 MB in the beginning and 80.3 MB in the end (delta: -26.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.75 ms. Allocated memory is still 117.4 MB. Free memory was 80.3 MB in the beginning and 79.7 MB in the end (delta: 563.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire2.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:36:46,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:36:46,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:36:46,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:36:46,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:36:46,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:36:46,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:36:46,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:36:46,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:36:46,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:36:46,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:36:46,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:36:46,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:36:46,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:36:46,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:36:46,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:36:46,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:36:46,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:36:46,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:36:46,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:36:46,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:36:46,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:36:46,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:36:46,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:36:46,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:36:46,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:36:46,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:36:46,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:36:46,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:36:46,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:36:46,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:36:46,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:36:46,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:36:46,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:36:46,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:36:46,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:36:46,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:36:46,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:36:46,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:36:46,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:36:46,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:36:46,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 01:36:46,425 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:36:46,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:36:46,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:36:46,428 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:36:46,428 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:36:46,429 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:36:46,429 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:36:46,429 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:36:46,429 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:36:46,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:36:46,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:36:46,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:36:46,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:36:46,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:36:46,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:36:46,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:36:46,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:36:46,434 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 01:36:46,434 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 01:36:46,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:36:46,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:36:46,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:36:46,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:36:46,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:36:46,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:36:46,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:36:46,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:36:46,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:36:46,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:36:46,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:36:46,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:36:46,437 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 01:36:46,437 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 01:36:46,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:36:46,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:36:46,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:36:46,438 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573aabe1a1502adb4c5e6135ed8c30ce3759c991 [2020-11-30 01:36:46,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:36:46,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:36:46,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:36:46,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:36:46,885 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:36:46,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-30 01:36:46,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/9a6fe64f6/43d31e7debf24e86bed39b8da565e236/FLAG02541dc07 [2020-11-30 01:36:47,542 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:36:47,546 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-30 01:36:47,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/9a6fe64f6/43d31e7debf24e86bed39b8da565e236/FLAG02541dc07 [2020-11-30 01:36:47,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/data/9a6fe64f6/43d31e7debf24e86bed39b8da565e236 [2020-11-30 01:36:47,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:36:47,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:36:47,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:36:47,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:36:47,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:36:47,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:36:47" (1/1) ... [2020-11-30 01:36:47,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ce1abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:47, skipping insertion in model container [2020-11-30 01:36:47,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:36:47" (1/1) ... [2020-11-30 01:36:47,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:36:47,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:36:48,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:36:48,191 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:36:48,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:36:48,241 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:36:48,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48 WrapperNode [2020-11-30 01:36:48,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:36:48,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:36:48,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:36:48,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:36:48,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:36:48,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:36:48,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:36:48,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:36:48,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... [2020-11-30 01:36:48,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:36:48,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:36:48,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:36:48,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:36:48,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:36:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 01:36:48,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:36:48,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:36:48,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:36:58,396 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:36:58,396 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-30 01:36:58,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:36:58 BoogieIcfgContainer [2020-11-30 01:36:58,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:36:58,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:36:58,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:36:58,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:36:58,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:36:47" (1/3) ... [2020-11-30 01:36:58,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb2a78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:36:58, skipping insertion in model container [2020-11-30 01:36:58,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:36:48" (2/3) ... [2020-11-30 01:36:58,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb2a78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:36:58, skipping insertion in model container [2020-11-30 01:36:58,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:36:58" (3/3) ... [2020-11-30 01:36:58,417 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2020-11-30 01:36:58,435 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:36:58,440 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-30 01:36:58,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-30 01:36:58,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:36:58,490 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:36:58,490 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:36:58,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:36:58,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:36:58,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:36:58,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:36:58,491 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:36:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-30 01:36:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:36:58,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:36:58,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:36:58,516 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:36:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:36:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 891015143, now seen corresponding path program 1 times [2020-11-30 01:36:58,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:36:58,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850071241] [2020-11-30 01:36:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 01:36:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:36:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 01:36:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:36:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:36:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:36:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:36:58,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850071241] [2020-11-30 01:36:58,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:36:58,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:36:58,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112846275] [2020-11-30 01:36:58,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:36:58,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:36:58,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:36:58,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:36:58,871 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-30 01:36:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:36:58,895 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-11-30 01:36:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:36:58,897 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 01:36:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:36:58,917 INFO L225 Difference]: With dead ends: 62 [2020-11-30 01:36:58,918 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:36:58,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:36:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:36:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 01:36:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:36:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-30 01:36:58,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-11-30 01:36:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:36:58,965 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-30 01:36:58,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:36:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-30 01:36:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:36:58,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:36:58,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:36:59,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 01:36:59,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:36:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:36:59,194 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-30 01:36:59,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:36:59,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635471017] [2020-11-30 01:36:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 01:36:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:36:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:36:59,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:36:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:36:59,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:37:02,544 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-30 01:37:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:37:02,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635471017] [2020-11-30 01:37:02,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:37:02,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 01:37:02,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852361502] [2020-11-30 01:37:02,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:37:02,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:37:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:37:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:37:02,568 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-11-30 01:37:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:37:26,403 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-11-30 01:37:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:37:26,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-11-30 01:37:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:37:26,405 INFO L225 Difference]: With dead ends: 43 [2020-11-30 01:37:26,405 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 01:37:26,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:37:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 01:37:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-11-30 01:37:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:37:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-30 01:37:26,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2020-11-30 01:37:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:37:26,416 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-30 01:37:26,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:37:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-30 01:37:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:37:26,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:37:26,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:37:26,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 01:37:26,631 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:37:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:37:26,634 INFO L82 PathProgramCache]: Analyzing trace with hash 179688749, now seen corresponding path program 1 times [2020-11-30 01:37:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:37:26,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401016912] [2020-11-30 01:37:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 01:37:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:37:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:37:27,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:37:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:37:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:37:31,217 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) is different from false [2020-11-30 01:37:33,255 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) is different from true [2020-11-30 01:37:40,070 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 11 [2020-11-30 01:37:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:37:40,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401016912] [2020-11-30 01:37:40,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:37:40,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-30 01:37:40,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608079113] [2020-11-30 01:37:40,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:37:40,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:37:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:37:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=30, Unknown=2, NotChecked=10, Total=56 [2020-11-30 01:37:40,074 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-11-30 01:37:47,417 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 01:37:52,915 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_11 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) v_ULTIMATE.start_main_~a~0_11))) (fp.sub c_currentRoundingMode .cse0 .cse0))) (_ bv0 32))) (= (_ bv1 32) c_ULTIMATE.start_main_~r~0) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse1 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2020-11-30 01:37:55,717 WARN L860 $PredicateComparison]: unable to prove that (and (= (_ bv1 32) c_ULTIMATE.start_main_~r~0) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2020-11-30 01:38:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:38:33,014 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-30 01:38:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:38:33,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-30 01:38:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:38:33,016 INFO L225 Difference]: With dead ends: 36 [2020-11-30 01:38:33,016 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:38:33,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=26, Invalid=54, Unknown=4, NotChecked=48, Total=132 [2020-11-30 01:38:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:38:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-11-30 01:38:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:38:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-30 01:38:33,027 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-11-30 01:38:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:38:33,027 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-30 01:38:33,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:38:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-30 01:38:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:38:33,028 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:38:33,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:38:33,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 01:38:33,243 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:38:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:38:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1251711063, now seen corresponding path program 1 times [2020-11-30 01:38:33,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:38:33,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289283390] [2020-11-30 01:38:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 01:38:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:38:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:38:33,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:38:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:38:33,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:38:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:38:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289283390] [2020-11-30 01:38:33,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:38:33,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 01:38:33,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656506669] [2020-11-30 01:38:33,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:38:33,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:38:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:38:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:38:33,787 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2020-11-30 01:38:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:38:34,908 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-11-30 01:38:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:38:34,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 01:38:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:38:34,910 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:38:34,910 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:38:34,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:38:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:38:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-11-30 01:38:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:38:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-11-30 01:38:34,926 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2020-11-30 01:38:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:38:34,926 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-11-30 01:38:34,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:38:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-11-30 01:38:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:38:34,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:38:34,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:38:35,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 01:38:35,147 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:38:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:38:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash 882382672, now seen corresponding path program 1 times [2020-11-30 01:38:35,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:38:35,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817572088] [2020-11-30 01:38:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-30 01:38:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:38:36,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:40:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:40:03,284 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:40:03,673 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-30 01:40:03,674 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:40:03,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-30 01:40:03,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:40:03 BoogieIcfgContainer [2020-11-30 01:40:03,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:40:03,909 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:40:03,909 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:40:03,910 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:40:03,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:36:58" (3/4) ... [2020-11-30 01:40:03,913 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:40:03,980 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_277cc785-eccc-48e3-995b-d064bf093321/bin/utaipan/witness.graphml [2020-11-30 01:40:03,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:40:03,982 INFO L168 Benchmark]: Toolchain (without parser) took 196087.07 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 23.8 MB in the beginning and 25.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:03,983 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 30.0 MB in the end (delta: 52.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:40:03,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.67 ms. Allocated memory is still 48.2 MB. Free memory was 23.6 MB in the beginning and 23.7 MB in the end (delta: -123.5 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:03,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.20 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 23.7 MB in the beginning and 43.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:03,985 INFO L168 Benchmark]: Boogie Preprocessor took 69.33 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 41.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:40:03,986 INFO L168 Benchmark]: RCFGBuilder took 9982.62 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 39.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:03,987 INFO L168 Benchmark]: TraceAbstraction took 185504.90 ms. Allocated memory is still 60.8 MB. Free memory was 39.2 MB in the beginning and 27.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:03,987 INFO L168 Benchmark]: Witness Printer took 71.32 ms. Allocated memory is still 60.8 MB. Free memory was 26.7 MB in the beginning and 25.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:03,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 30.0 MB in the end (delta: 52.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 344.67 ms. Allocated memory is still 48.2 MB. Free memory was 23.6 MB in the beginning and 23.7 MB in the end (delta: -123.5 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.20 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 23.7 MB in the beginning and 43.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.33 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 41.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 9982.62 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 39.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 185504.90 ms. Allocated memory is still 60.8 MB. Free memory was 39.2 MB in the beginning and 27.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Witness Printer took 71.32 ms. Allocated memory is still 60.8 MB. Free memory was 26.7 MB in the beginning and 25.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire2.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 185.3s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 77.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 80 SDslu, 177 SDs, 0 SdLazy, 132 SolverSat, 24 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 62.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, 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, 4 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 2130 SizeOfPredicates, 11 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...