./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.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_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8ffdb7e52f13c5228ce15f1d79a563f57556d0a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 19:08:48,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:08:48,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:08:48,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:08:48,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:08:48,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:08:48,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:08:48,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:08:48,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:08:48,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:08:48,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:08:48,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:08:48,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:08:48,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:08:48,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:08:48,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:08:48,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:08:48,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:08:48,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:08:48,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:08:48,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:08:48,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:08:48,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:08:48,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:08:48,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:08:48,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:08:48,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:08:48,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:08:48,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:08:48,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:08:48,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:08:48,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:08:48,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:08:48,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:08:48,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:08:48,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:08:48,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:08:48,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:08:48,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:08:48,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:08:48,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:08:48,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:08:48,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:08:48,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:08:48,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:08:48,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:08:48,258 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:08:48,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:08:48,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:08:48,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:08:48,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:08:48,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:08:48,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:08:48,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:08:48,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:08:48,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:08:48,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:08:48,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:08:48,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:08:48,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:08:48,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:08:48,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:08:48,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:08:48,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:08:48,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:08:48,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:08:48,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:08:48,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:08:48,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:08:48,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:08:48,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:08:48,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2020-11-29 19:08:48,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:08:48,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:08:48,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:08:48,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:08:48,616 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:08:48,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-11-29 19:08:48,709 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/data/23dd19487/f36ffbcb095f4e7a84cfd8823965ae9a/FLAGa147e3912 [2020-11-29 19:08:49,260 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:08:49,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-11-29 19:08:49,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/data/23dd19487/f36ffbcb095f4e7a84cfd8823965ae9a/FLAGa147e3912 [2020-11-29 19:08:49,627 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/data/23dd19487/f36ffbcb095f4e7a84cfd8823965ae9a [2020-11-29 19:08:49,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:08:49,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:08:49,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:08:49,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:08:49,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:08:49,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:49,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e558049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49, skipping insertion in model container [2020-11-29 19:08:49,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:49,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:08:49,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:08:49,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:08:49,924 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:08:49,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:08:49,990 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:08:49,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49 WrapperNode [2020-11-29 19:08:49,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:08:49,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:08:49,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:08:49,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:08:50,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:08:50,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:08:50,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:08:50,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:08:50,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... [2020-11-29 19:08:50,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:08:50,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:08:50,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:08:50,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:08:50,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:08:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:08:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:08:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:08:50,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:08:50,608 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:08:50,609 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-29 19:08:50,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:08:50 BoogieIcfgContainer [2020-11-29 19:08:50,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:08:50,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:08:50,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:08:50,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:08:50,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:08:49" (1/3) ... [2020-11-29 19:08:50,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d77d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:08:50, skipping insertion in model container [2020-11-29 19:08:50,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:49" (2/3) ... [2020-11-29 19:08:50,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d77d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:08:50, skipping insertion in model container [2020-11-29 19:08:50,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:08:50" (3/3) ... [2020-11-29 19:08:50,642 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2020-11-29 19:08:50,655 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:08:50,659 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 19:08:50,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 19:08:50,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:08:50,696 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:08:50,696 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:08:50,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:08:50,696 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:08:50,696 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:08:50,696 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:08:50,697 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:08:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-29 19:08:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:08:50,718 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:50,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:50,719 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1235309937, now seen corresponding path program 1 times [2020-11-29 19:08:50,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:50,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128320591] [2020-11-29 19:08:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:50,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128320591] [2020-11-29 19:08:50,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:08:50,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:08:50,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601626076] [2020-11-29 19:08:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:08:50,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:50,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:08:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:08:50,986 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-29 19:08:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:51,009 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-29 19:08:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:08:51,011 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 19:08:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:51,022 INFO L225 Difference]: With dead ends: 39 [2020-11-29 19:08:51,022 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 19:08:51,037 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 [2020-11-29 19:08:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 19:08:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 19:08:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 19:08:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-29 19:08:51,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-11-29 19:08:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:51,080 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-29 19:08:51,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:08:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-29 19:08:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:08:51,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:51,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:51,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:08:51,082 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:51,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-11-29 19:08:51,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020940376] [2020-11-29 19:08:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:51,124 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:51,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13523917] [2020-11-29 19:08:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:08:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:51,313 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:08:51,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:08:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020940376] [2020-11-29 19:08:51,411 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:51,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13523917] [2020-11-29 19:08:51,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:08:51,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:08:51,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508197783] [2020-11-29 19:08:51,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:08:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:08:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:08:51,416 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-11-29 19:08:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:51,717 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-11-29 19:08:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:08:51,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 19:08:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:51,720 INFO L225 Difference]: With dead ends: 32 [2020-11-29 19:08:51,720 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 19:08:51,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:08:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 19:08:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-11-29 19:08:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:08:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-29 19:08:51,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-11-29 19:08:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:51,732 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-29 19:08:51,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:08:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-29 19:08:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:08:51,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:51,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:51,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:08:51,948 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1507423092, now seen corresponding path program 1 times [2020-11-29 19:08:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:51,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562902119] [2020-11-29 19:08:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:51,978 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:51,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725661794] [2020-11-29 19:08:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:08:52,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:52,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562902119] [2020-11-29 19:08:52,082 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:52,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725661794] [2020-11-29 19:08:52,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:08:52,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:08:52,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149325965] [2020-11-29 19:08:52,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:08:52,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:08:52,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:08:52,093 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-29 19:08:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:52,130 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-29 19:08:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:08:52,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 19:08:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:52,132 INFO L225 Difference]: With dead ends: 24 [2020-11-29 19:08:52,132 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 19:08:52,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:08:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 19:08:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 19:08:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:08:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-29 19:08:52,138 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-11-29 19:08:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:52,138 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-29 19:08:52,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:08:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-29 19:08:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:08:52,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:52,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:52,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:52,348 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1188504123, now seen corresponding path program 1 times [2020-11-29 19:08:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:52,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218586840] [2020-11-29 19:08:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:52,379 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:52,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266095496] [2020-11-29 19:08:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:52,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:08:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:52,517 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:08:52,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:08:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:52,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218586840] [2020-11-29 19:08:52,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:52,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266095496] [2020-11-29 19:08:52,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:08:52,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:08:52,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631919670] [2020-11-29 19:08:52,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:08:52,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:08:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:08:52,647 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-11-29 19:08:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:52,830 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-29 19:08:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:08:52,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-29 19:08:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:52,832 INFO L225 Difference]: With dead ends: 24 [2020-11-29 19:08:52,832 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 19:08:52,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:08:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 19:08:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-11-29 19:08:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 19:08:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-29 19:08:52,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-11-29 19:08:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:52,848 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-29 19:08:52,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:08:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-29 19:08:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:08:52,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:52,850 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:53,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:53,051 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1768635143, now seen corresponding path program 1 times [2020-11-29 19:08:53,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:53,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593934558] [2020-11-29 19:08:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:53,080 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:53,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244687187] [2020-11-29 19:08:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:53,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:08:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593934558] [2020-11-29 19:08:53,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244687187] [2020-11-29 19:08:53,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:53,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 19:08:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309215556] [2020-11-29 19:08:53,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:08:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:08:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:08:53,205 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-29 19:08:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:53,251 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-29 19:08:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:08:53,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 19:08:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:53,254 INFO L225 Difference]: With dead ends: 26 [2020-11-29 19:08:53,254 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 19:08:53,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:08:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 19:08:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-29 19:08:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 19:08:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-11-29 19:08:53,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-11-29 19:08:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:53,260 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-11-29 19:08:53,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:08:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-11-29 19:08:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:08:53,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:53,280 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:53,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:53,480 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 71944364, now seen corresponding path program 2 times [2020-11-29 19:08:53,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:53,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113641114] [2020-11-29 19:08:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:53,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:53,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730706757] [2020-11-29 19:08:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:53,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:08:53,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:53,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:08:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:53,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113641114] [2020-11-29 19:08:53,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:53,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730706757] [2020-11-29 19:08:53,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:53,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 19:08:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57425110] [2020-11-29 19:08:53,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:08:53,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:08:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:08:53,637 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-11-29 19:08:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:53,708 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-29 19:08:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:08:53,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-29 19:08:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:53,709 INFO L225 Difference]: With dead ends: 31 [2020-11-29 19:08:53,710 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:08:53,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:08:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:08:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 19:08:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:08:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-29 19:08:53,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-11-29 19:08:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:53,720 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-29 19:08:53,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:08:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-29 19:08:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:08:53,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:53,722 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:53,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:08:53,923 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 800201945, now seen corresponding path program 3 times [2020-11-29 19:08:53,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:53,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961801607] [2020-11-29 19:08:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:53,946 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:53,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819206485] [2020-11-29 19:08:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:54,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 19:08:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:08:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:54,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961801607] [2020-11-29 19:08:54,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819206485] [2020-11-29 19:08:54,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:54,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 19:08:54,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075538758] [2020-11-29 19:08:54,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:08:54,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:08:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:08:54,105 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-11-29 19:08:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:54,201 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-29 19:08:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:08:54,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-29 19:08:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:54,203 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:08:54,203 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 19:08:54,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:08:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 19:08:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-29 19:08:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 19:08:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-29 19:08:54,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-11-29 19:08:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:54,213 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-29 19:08:54,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:08:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-29 19:08:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 19:08:54,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:54,214 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:54,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:54,443 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:54,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1993843508, now seen corresponding path program 4 times [2020-11-29 19:08:54,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:54,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678914707] [2020-11-29 19:08:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:54,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:54,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364159714] [2020-11-29 19:08:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:54,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:08:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:08:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:54,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678914707] [2020-11-29 19:08:54,650 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:54,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364159714] [2020-11-29 19:08:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 19:08:54,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828102509] [2020-11-29 19:08:54,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:08:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:54,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:08:54,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:08:54,652 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-11-29 19:08:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:54,755 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-11-29 19:08:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:08:54,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-29 19:08:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:54,757 INFO L225 Difference]: With dead ends: 41 [2020-11-29 19:08:54,757 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 19:08:54,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:08:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 19:08:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-29 19:08:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 19:08:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-11-29 19:08:54,766 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-11-29 19:08:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:54,767 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-11-29 19:08:54,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:08:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-11-29 19:08:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 19:08:54,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:54,768 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:54,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:54,969 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:54,970 INFO L82 PathProgramCache]: Analyzing trace with hash -915727175, now seen corresponding path program 5 times [2020-11-29 19:08:54,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:54,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807957440] [2020-11-29 19:08:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:54,995 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:54,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007588600] [2020-11-29 19:08:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:55,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 19:08:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:55,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:08:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:55,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807957440] [2020-11-29 19:08:55,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:55,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007588600] [2020-11-29 19:08:55,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:55,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 19:08:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96794398] [2020-11-29 19:08:55,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:08:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:08:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:08:55,201 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-11-29 19:08:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:55,354 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-11-29 19:08:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:08:55,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-11-29 19:08:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:55,355 INFO L225 Difference]: With dead ends: 46 [2020-11-29 19:08:55,356 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 19:08:55,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:08:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 19:08:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 19:08:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:08:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-11-29 19:08:55,376 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2020-11-29 19:08:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:55,378 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-11-29 19:08:55,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:08:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-11-29 19:08:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 19:08:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:55,380 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:55,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 19:08:55,596 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -462141204, now seen corresponding path program 6 times [2020-11-29 19:08:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:55,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28558631] [2020-11-29 19:08:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:55,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:55,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763393228] [2020-11-29 19:08:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:55,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 19:08:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:08:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:55,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28558631] [2020-11-29 19:08:55,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:55,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763393228] [2020-11-29 19:08:55,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:55,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 19:08:55,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402937420] [2020-11-29 19:08:55,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:08:55,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:55,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:08:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:08:55,854 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-11-29 19:08:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:55,998 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-29 19:08:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:08:55,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-11-29 19:08:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:56,000 INFO L225 Difference]: With dead ends: 51 [2020-11-29 19:08:56,000 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 19:08:56,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:08:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 19:08:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-29 19:08:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 19:08:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-11-29 19:08:56,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-11-29 19:08:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:56,016 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-11-29 19:08:56,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:08:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-11-29 19:08:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 19:08:56,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:56,027 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:56,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:56,228 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1286749031, now seen corresponding path program 7 times [2020-11-29 19:08:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:56,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205807838] [2020-11-29 19:08:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:56,250 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:56,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216711508] [2020-11-29 19:08:56,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:08:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205807838] [2020-11-29 19:08:56,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216711508] [2020-11-29 19:08:56,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:56,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 19:08:56,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348865895] [2020-11-29 19:08:56,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:08:56,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:56,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:08:56,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:08:56,518 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2020-11-29 19:08:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:56,673 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-11-29 19:08:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 19:08:56,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-11-29 19:08:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:56,677 INFO L225 Difference]: With dead ends: 56 [2020-11-29 19:08:56,677 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 19:08:56,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:08:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 19:08:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-11-29 19:08:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 19:08:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-11-29 19:08:56,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2020-11-29 19:08:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:56,688 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-11-29 19:08:56,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:08:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-11-29 19:08:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 19:08:56,689 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:56,689 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:56,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:56,918 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1331662092, now seen corresponding path program 8 times [2020-11-29 19:08:56,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:56,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117623880] [2020-11-29 19:08:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:56,930 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:56,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698701855] [2020-11-29 19:08:56,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:57,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:08:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 19:08:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:57,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117623880] [2020-11-29 19:08:57,226 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:57,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698701855] [2020-11-29 19:08:57,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:57,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 19:08:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634258565] [2020-11-29 19:08:57,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:08:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:08:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:08:57,231 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-11-29 19:08:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:57,436 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-29 19:08:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:08:57,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-11-29 19:08:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:57,438 INFO L225 Difference]: With dead ends: 61 [2020-11-29 19:08:57,438 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 19:08:57,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:08:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 19:08:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-29 19:08:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 19:08:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-11-29 19:08:57,460 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2020-11-29 19:08:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:57,461 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-11-29 19:08:57,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:08:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-11-29 19:08:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 19:08:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:57,465 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:57,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 19:08:57,680 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1553460103, now seen corresponding path program 9 times [2020-11-29 19:08:57,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:57,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36018105] [2020-11-29 19:08:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:57,690 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:57,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865590383] [2020-11-29 19:08:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:57,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 19:08:57,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:08:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:58,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36018105] [2020-11-29 19:08:58,055 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:58,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865590383] [2020-11-29 19:08:58,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:58,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 19:08:58,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062912589] [2020-11-29 19:08:58,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:08:58,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:08:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:08:58,058 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-11-29 19:08:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:58,264 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-11-29 19:08:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 19:08:58,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-11-29 19:08:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:58,265 INFO L225 Difference]: With dead ends: 66 [2020-11-29 19:08:58,265 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 19:08:58,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:08:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 19:08:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-29 19:08:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 19:08:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-11-29 19:08:58,274 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2020-11-29 19:08:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:58,274 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-11-29 19:08:58,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:08:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-11-29 19:08:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 19:08:58,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:58,276 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:58,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 19:08:58,504 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1399051988, now seen corresponding path program 10 times [2020-11-29 19:08:58,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:58,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210140362] [2020-11-29 19:08:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:58,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:58,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575456793] [2020-11-29 19:08:58,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:58,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:08:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:08:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:58,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210140362] [2020-11-29 19:08:58,886 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:58,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575456793] [2020-11-29 19:08:58,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:58,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 19:08:58,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250835118] [2020-11-29 19:08:58,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:08:58,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:08:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:08:58,888 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-11-29 19:08:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:59,100 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-11-29 19:08:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 19:08:59,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-11-29 19:08:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:59,102 INFO L225 Difference]: With dead ends: 71 [2020-11-29 19:08:59,102 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 19:08:59,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:08:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 19:08:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-29 19:08:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 19:08:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-11-29 19:08:59,114 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2020-11-29 19:08:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:59,115 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-11-29 19:08:59,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:08:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-11-29 19:08:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-29 19:08:59,116 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:59,116 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:08:59,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:08:59,317 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:08:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1773663143, now seen corresponding path program 11 times [2020-11-29 19:08:59,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:59,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870557623] [2020-11-29 19:08:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:59,329 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:08:59,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824441862] [2020-11-29 19:08:59,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:08:59,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 19:08:59,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:08:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 19:08:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:59,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870557623] [2020-11-29 19:08:59,706 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:08:59,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824441862] [2020-11-29 19:08:59,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:08:59,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 19:08:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675528402] [2020-11-29 19:08:59,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:08:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:59,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:08:59,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:08:59,714 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2020-11-29 19:08:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:59,931 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-11-29 19:08:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 19:08:59,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-11-29 19:08:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:08:59,932 INFO L225 Difference]: With dead ends: 76 [2020-11-29 19:08:59,932 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 19:08:59,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:08:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 19:08:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-29 19:08:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 19:08:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-11-29 19:08:59,957 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2020-11-29 19:08:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:08:59,957 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-11-29 19:08:59,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:08:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-11-29 19:08:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-29 19:08:59,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:08:59,958 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:00,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:00,172 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1470358196, now seen corresponding path program 12 times [2020-11-29 19:09:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964353089] [2020-11-29 19:09:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:00,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:00,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706253402] [2020-11-29 19:09:00,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:00,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 19:09:00,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 19:09:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:00,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964353089] [2020-11-29 19:09:00,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:00,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706253402] [2020-11-29 19:09:00,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:00,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-29 19:09:00,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507041898] [2020-11-29 19:09:00,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:09:00,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:09:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:09:00,749 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2020-11-29 19:09:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:01,027 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-11-29 19:09:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 19:09:01,028 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-11-29 19:09:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:01,029 INFO L225 Difference]: With dead ends: 81 [2020-11-29 19:09:01,029 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 19:09:01,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-11-29 19:09:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 19:09:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-29 19:09:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 19:09:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-11-29 19:09:01,052 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2020-11-29 19:09:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:01,053 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-11-29 19:09:01,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:09:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-11-29 19:09:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-29 19:09:01,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:01,054 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:01,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 19:09:01,260 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1359238087, now seen corresponding path program 13 times [2020-11-29 19:09:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:01,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094708893] [2020-11-29 19:09:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:01,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:01,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099987548] [2020-11-29 19:09:01,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 19:09:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094708893] [2020-11-29 19:09:01,657 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099987548] [2020-11-29 19:09:01,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:01,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-29 19:09:01,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226636625] [2020-11-29 19:09:01,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:09:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:01,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:09:01,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:09:01,663 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2020-11-29 19:09:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:01,952 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-11-29 19:09:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 19:09:01,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-29 19:09:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:01,953 INFO L225 Difference]: With dead ends: 86 [2020-11-29 19:09:01,954 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 19:09:01,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2020-11-29 19:09:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 19:09:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-29 19:09:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 19:09:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-11-29 19:09:01,963 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2020-11-29 19:09:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:01,963 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-11-29 19:09:01,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:09:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-11-29 19:09:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-29 19:09:01,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:01,965 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:02,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:09:02,184 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -665753236, now seen corresponding path program 14 times [2020-11-29 19:09:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:02,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939212303] [2020-11-29 19:09:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:02,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:02,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537443589] [2020-11-29 19:09:02,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:02,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:09:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 19:09:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:02,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939212303] [2020-11-29 19:09:02,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:02,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537443589] [2020-11-29 19:09:02,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:02,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-29 19:09:02,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041574365] [2020-11-29 19:09:02,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:09:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:09:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:09:02,625 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2020-11-29 19:09:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:02,955 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-11-29 19:09:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 19:09:02,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-11-29 19:09:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:02,956 INFO L225 Difference]: With dead ends: 91 [2020-11-29 19:09:02,956 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 19:09:02,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2020-11-29 19:09:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 19:09:02,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-29 19:09:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 19:09:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-11-29 19:09:02,965 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2020-11-29 19:09:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:02,966 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-11-29 19:09:02,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:09:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-11-29 19:09:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-29 19:09:02,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:02,967 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:03,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:09:03,172 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:03,172 INFO L82 PathProgramCache]: Analyzing trace with hash 386987033, now seen corresponding path program 15 times [2020-11-29 19:09:03,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:03,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382571873] [2020-11-29 19:09:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:03,179 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:03,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925521344] [2020-11-29 19:09:03,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:03,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 19:09:03,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 19:09:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:03,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382571873] [2020-11-29 19:09:03,777 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:03,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925521344] [2020-11-29 19:09:03,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:03,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-29 19:09:03,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092201273] [2020-11-29 19:09:03,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 19:09:03,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 19:09:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:09:03,783 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-11-29 19:09:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:04,135 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-11-29 19:09:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 19:09:04,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-11-29 19:09:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:04,138 INFO L225 Difference]: With dead ends: 96 [2020-11-29 19:09:04,138 INFO L226 Difference]: Without dead ends: 92 [2020-11-29 19:09:04,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 19:09:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-29 19:09:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-11-29 19:09:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 19:09:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-11-29 19:09:04,146 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2020-11-29 19:09:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:04,146 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-11-29 19:09:04,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 19:09:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-11-29 19:09:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-29 19:09:04,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:04,147 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:04,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:04,361 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -609350260, now seen corresponding path program 16 times [2020-11-29 19:09:04,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:04,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791313718] [2020-11-29 19:09:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:04,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:04,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893833145] [2020-11-29 19:09:04,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:04,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:09:04,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 19:09:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:04,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791313718] [2020-11-29 19:09:04,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:04,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893833145] [2020-11-29 19:09:04,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:04,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-29 19:09:04,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788064172] [2020-11-29 19:09:04,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:09:04,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:09:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:09:04,799 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2020-11-29 19:09:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:05,208 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-11-29 19:09:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 19:09:05,209 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-11-29 19:09:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:05,210 INFO L225 Difference]: With dead ends: 101 [2020-11-29 19:09:05,210 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 19:09:05,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 19:09:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 19:09:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-11-29 19:09:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 19:09:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-11-29 19:09:05,219 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2020-11-29 19:09:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:05,220 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-11-29 19:09:05,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:09:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-11-29 19:09:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-29 19:09:05,221 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:05,221 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:05,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:05,436 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash -560602119, now seen corresponding path program 17 times [2020-11-29 19:09:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:05,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156806672] [2020-11-29 19:09:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:05,450 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:05,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015910400] [2020-11-29 19:09:05,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:05,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-29 19:09:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 19:09:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:05,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156806672] [2020-11-29 19:09:05,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:05,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015910400] [2020-11-29 19:09:05,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:05,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-29 19:09:05,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74492209] [2020-11-29 19:09:05,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:09:05,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:05,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:09:05,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:09:05,968 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2020-11-29 19:09:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:06,378 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-11-29 19:09:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-29 19:09:06,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-11-29 19:09:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:06,380 INFO L225 Difference]: With dead ends: 106 [2020-11-29 19:09:06,380 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 19:09:06,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 19:09:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 19:09:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-11-29 19:09:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-29 19:09:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-11-29 19:09:06,389 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2020-11-29 19:09:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:06,390 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-11-29 19:09:06,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:09:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-11-29 19:09:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-29 19:09:06,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:06,391 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:06,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 19:09:06,596 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2065959340, now seen corresponding path program 18 times [2020-11-29 19:09:06,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:06,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024248584] [2020-11-29 19:09:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:06,604 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435192861] [2020-11-29 19:09:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:06,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 19:09:06,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 19:09:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:07,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024248584] [2020-11-29 19:09:07,232 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:07,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435192861] [2020-11-29 19:09:07,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:07,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-29 19:09:07,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553799690] [2020-11-29 19:09:07,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:09:07,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:07,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:09:07,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:09:07,235 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2020-11-29 19:09:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:07,679 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-11-29 19:09:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 19:09:07,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-11-29 19:09:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:07,684 INFO L225 Difference]: With dead ends: 111 [2020-11-29 19:09:07,684 INFO L226 Difference]: Without dead ends: 107 [2020-11-29 19:09:07,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 19:09:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-29 19:09:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-11-29 19:09:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 19:09:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-11-29 19:09:07,696 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2020-11-29 19:09:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:07,696 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-11-29 19:09:07,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:09:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-11-29 19:09:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 19:09:07,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:07,698 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:07,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 19:09:07,924 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:07,924 INFO L82 PathProgramCache]: Analyzing trace with hash -602375207, now seen corresponding path program 19 times [2020-11-29 19:09:07,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:07,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614914103] [2020-11-29 19:09:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:07,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:07,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164829362] [2020-11-29 19:09:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 19:09:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:08,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614914103] [2020-11-29 19:09:08,420 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:09:08,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164829362] [2020-11-29 19:09:08,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:08,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-29 19:09:08,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904817942] [2020-11-29 19:09:08,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:09:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:08,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:09:08,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:09:08,423 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2020-11-29 19:09:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:08,950 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-11-29 19:09:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-29 19:09:08,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-11-29 19:09:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:08,953 INFO L225 Difference]: With dead ends: 116 [2020-11-29 19:09:08,953 INFO L226 Difference]: Without dead ends: 112 [2020-11-29 19:09:08,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 19:09:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-29 19:09:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-11-29 19:09:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 19:09:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-11-29 19:09:08,964 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2020-11-29 19:09:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:08,965 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-11-29 19:09:08,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:09:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-11-29 19:09:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-29 19:09:08,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:08,966 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:09,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:09,188 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -924492340, now seen corresponding path program 20 times [2020-11-29 19:09:09,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:09,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411041787] [2020-11-29 19:09:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:09,198 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:09:09,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170635276] [2020-11-29 19:09:09,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:09,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:09:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 19:09:09,349 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:09,396 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:09,525 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:09,525 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:09:09,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 19:09:09,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:09:09 BoogieIcfgContainer [2020-11-29 19:09:09,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:09:09,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:09:09,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:09:09,884 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:09:09,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:08:50" (3/4) ... [2020-11-29 19:09:09,888 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:09:10,028 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bf3d3828-9c65-4a1b-a5fb-3667cfd90391/bin/uautomizer/witness.graphml [2020-11-29 19:09:10,028 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:09:10,035 INFO L168 Benchmark]: Toolchain (without parser) took 20397.40 ms. Allocated memory was 81.8 MB in the beginning and 174.1 MB in the end (delta: 92.3 MB). Free memory was 53.2 MB in the beginning and 107.2 MB in the end (delta: -54.1 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:10,036 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 81.8 MB. Free memory was 42.0 MB in the beginning and 41.9 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:10,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.92 ms. Allocated memory is still 81.8 MB. Free memory was 53.0 MB in the beginning and 60.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:10,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.85 ms. Allocated memory is still 81.8 MB. Free memory was 60.3 MB in the beginning and 58.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:10,037 INFO L168 Benchmark]: Boogie Preprocessor took 32.50 ms. Allocated memory is still 81.8 MB. Free memory was 58.8 MB in the beginning and 57.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:10,037 INFO L168 Benchmark]: RCFGBuilder took 517.39 ms. Allocated memory is still 81.8 MB. Free memory was 57.6 MB in the beginning and 45.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:10,038 INFO L168 Benchmark]: TraceAbstraction took 19255.75 ms. Allocated memory was 81.8 MB in the beginning and 174.1 MB in the end (delta: 92.3 MB). Free memory was 44.5 MB in the beginning and 115.6 MB in the end (delta: -71.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:10,038 INFO L168 Benchmark]: Witness Printer took 144.54 ms. Allocated memory is still 174.1 MB. Free memory was 115.6 MB in the beginning and 107.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:10,040 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 81.8 MB. Free memory was 42.0 MB in the beginning and 41.9 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.92 ms. Allocated memory is still 81.8 MB. Free memory was 53.0 MB in the beginning and 60.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.85 ms. Allocated memory is still 81.8 MB. Free memory was 60.3 MB in the beginning and 58.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.50 ms. Allocated memory is still 81.8 MB. Free memory was 58.8 MB in the beginning and 57.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 517.39 ms. Allocated memory is still 81.8 MB. Free memory was 57.6 MB in the beginning and 45.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19255.75 ms. Allocated memory was 81.8 MB in the beginning and 174.1 MB in the end (delta: 92.3 MB). Free memory was 44.5 MB in the beginning and 115.6 MB in the end (delta: -71.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * Witness Printer took 144.54 ms. Allocated memory is still 174.1 MB. Free memory was 115.6 MB in the beginning and 107.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.0s, OverallIterations: 24, TraceHistogramMax: 21, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 330 SDtfs, 482 SDslu, 1585 SDs, 0 SdLazy, 599 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1370 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1314 NumberOfCodeBlocks, 1314 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 1180 ConstructedInterpolants, 0 QuantifiedInterpolants, 242550 SizeOfPredicates, 208 NumberOfNonLiveVariables, 5135 ConjunctsInSsa, 464 ConjunctsInUnsatCore, 23 InterpolantComputations, 4 PerfectInterpolantSequences, 0/6080 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! Received shutdown request...