./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 a5fa90664ca55dc032190ae3401b73f390ff1e9b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-5485861 [2020-10-26 00:07:28,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:07:28,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:07:28,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:07:28,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:07:28,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:07:28,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:07:28,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:07:28,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:07:28,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:07:28,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:07:28,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:07:28,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:07:28,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:07:28,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:07:28,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:07:28,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:07:28,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:07:28,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:07:28,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:07:28,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:07:28,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:07:28,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:07:28,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:07:28,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:07:28,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:07:28,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:07:28,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:07:28,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:07:28,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:07:28,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:07:28,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:07:28,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:07:28,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:07:28,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:07:28,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:07:28,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:07:28,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:07:28,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:07:28,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:07:28,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:07:28,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:07:29,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:07:29,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:07:29,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:07:29,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:07:29,023 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:07:29,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:07:29,024 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:07:29,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:07:29,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:07:29,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:07:29,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:07:29,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:07:29,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:07:29,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:07:29,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:07:29,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:07:29,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:07:29,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:07:29,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:07:29,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:07:29,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:07:29,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:07:29,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:07:29,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:07:29,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:07:29,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:07:29,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:07:29,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:07:29,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:07:29,028 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5fa90664ca55dc032190ae3401b73f390ff1e9b [2020-10-26 00:07:29,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:07:29,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:07:29,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:07:29,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:07:29,509 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:07:29,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-2.i [2020-10-26 00:07:29,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897464cd1/9d12d8cf1b9b41f5852a474212056ffc/FLAG3b2a1ed78 [2020-10-26 00:07:30,450 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:07:30,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i [2020-10-26 00:07:30,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897464cd1/9d12d8cf1b9b41f5852a474212056ffc/FLAG3b2a1ed78 [2020-10-26 00:07:30,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/897464cd1/9d12d8cf1b9b41f5852a474212056ffc [2020-10-26 00:07:30,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:07:30,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:07:30,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:07:30,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:07:30,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:07:30,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:07:30" (1/1) ... [2020-10-26 00:07:30,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441a2bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:30, skipping insertion in model container [2020-10-26 00:07:30,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:07:30" (1/1) ... [2020-10-26 00:07:30,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:07:30,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:07:31,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:07:31,179 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:07:31,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:07:31,392 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:07:31,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31 WrapperNode [2020-10-26 00:07:31,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:07:31,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:07:31,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:07:31,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:07:31,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:07:31,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:07:31,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:07:31,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:07:31,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... [2020-10-26 00:07:31,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:07:31,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:07:31,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:07:31,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:07:31,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-26 00:07:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-26 00:07:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-26 00:07:31,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-26 00:07:31,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:07:31,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-26 00:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:07:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-26 00:07:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:07:31,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:07:31,581 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-26 00:07:32,018 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:07:32,018 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-26 00:07:32,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:32 BoogieIcfgContainer [2020-10-26 00:07:32,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:07:32,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:07:32,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:07:32,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:07:32,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:07:30" (1/3) ... [2020-10-26 00:07:32,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f14033f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:07:32, skipping insertion in model container [2020-10-26 00:07:32,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:31" (2/3) ... [2020-10-26 00:07:32,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f14033f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:07:32, skipping insertion in model container [2020-10-26 00:07:32,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:32" (3/3) ... [2020-10-26 00:07:32,034 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-26 00:07:32,048 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:07:32,048 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:07:32,055 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 00:07:32,056 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:07:32,087 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,087 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,088 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,088 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,088 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,088 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,089 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,089 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,089 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,089 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,090 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,090 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,090 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,091 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,091 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,091 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,091 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,092 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,092 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,092 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,092 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,093 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,093 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,093 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,093 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,094 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,094 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,096 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,097 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,097 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,106 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,106 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,107 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,107 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,107 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,107 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:32,109 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-26 00:07:32,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-26 00:07:32,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:07:32,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:07:32,150 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:07:32,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:07:32,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:07:32,151 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:07:32,151 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:07:32,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:07:32,164 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:07:32,167 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-26 00:07:32,170 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-26 00:07:32,173 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-26 00:07:32,214 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-26 00:07:32,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-26 00:07:32,219 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-26 00:07:32,222 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-26 00:07:33,180 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-26 00:07:33,655 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-26 00:07:33,760 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-26 00:07:34,168 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-26 00:07:34,316 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-26 00:07:34,371 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-26 00:07:34,371 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-26 00:07:34,378 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-26 00:07:34,389 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-26 00:07:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-26 00:07:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-26 00:07:34,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:34,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-26 00:07:34,399 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-26 00:07:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:34,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929073300] [2020-10-26 00:07:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:34,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929073300] [2020-10-26 00:07:34,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:34,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:07:34,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563466649] [2020-10-26 00:07:34,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:07:34,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:07:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:07:34,673 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-26 00:07:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:34,742 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-26 00:07:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:07:34,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-26 00:07:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:34,756 INFO L225 Difference]: With dead ends: 75 [2020-10-26 00:07:34,756 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 00:07:34,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:07:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 00:07:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 00:07:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 00:07:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-26 00:07:34,801 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-26 00:07:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:34,801 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-26 00:07:34,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:07:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-26 00:07:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-26 00:07:34,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:34,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:34,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:07:34,803 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:34,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-26 00:07:34,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:34,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276245121] [2020-10-26 00:07:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:34,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276245121] [2020-10-26 00:07:34,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:34,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:07:34,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74037024] [2020-10-26 00:07:34,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 00:07:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:34,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 00:07:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:07:34,948 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-26 00:07:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:34,979 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-26 00:07:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 00:07:34,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-26 00:07:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:34,981 INFO L225 Difference]: With dead ends: 56 [2020-10-26 00:07:34,981 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 00:07:34,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:07:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 00:07:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-26 00:07:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 00:07:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-26 00:07:34,989 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-26 00:07:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:34,991 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-26 00:07:34,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 00:07:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-26 00:07:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:07:34,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:34,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:34,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:07:34,992 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-26 00:07:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:34,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240088932] [2020-10-26 00:07:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:35,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240088932] [2020-10-26 00:07:35,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:35,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:07:35,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176580309] [2020-10-26 00:07:35,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:07:35,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:35,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:07:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:07:35,110 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-26 00:07:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:35,233 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-26 00:07:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 00:07:35,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-26 00:07:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:35,236 INFO L225 Difference]: With dead ends: 54 [2020-10-26 00:07:35,236 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 00:07:35,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:07:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 00:07:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-26 00:07:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 00:07:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-26 00:07:35,244 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-26 00:07:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:35,244 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-26 00:07:35,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:07:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-26 00:07:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:07:35,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:35,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:35,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:07:35,246 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-26 00:07:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:35,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296603510] [2020-10-26 00:07:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:35,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296603510] [2020-10-26 00:07:35,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:35,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:07:35,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848524224] [2020-10-26 00:07:35,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:07:35,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:35,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:07:35,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:07:35,322 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-26 00:07:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:35,394 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-26 00:07:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 00:07:35,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-26 00:07:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:35,396 INFO L225 Difference]: With dead ends: 59 [2020-10-26 00:07:35,396 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 00:07:35,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:07:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 00:07:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-26 00:07:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 00:07:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-26 00:07:35,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-26 00:07:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:35,404 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-26 00:07:35,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:07:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-26 00:07:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:07:35,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:35,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:35,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:07:35,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-26 00:07:35,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:35,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852367046] [2020-10-26 00:07:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:35,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852367046] [2020-10-26 00:07:35,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:35,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:07:35,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900110650] [2020-10-26 00:07:35,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:07:35,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:07:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:07:35,477 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-26 00:07:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:35,553 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-26 00:07:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 00:07:35,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-26 00:07:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:35,555 INFO L225 Difference]: With dead ends: 65 [2020-10-26 00:07:35,555 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 00:07:35,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:07:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 00:07:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-26 00:07:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 00:07:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-26 00:07:35,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-26 00:07:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:35,563 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-26 00:07:35,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:07:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-26 00:07:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-26 00:07:35,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:35,564 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:35,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 00:07:35,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:35,566 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-26 00:07:35,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:35,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749373345] [2020-10-26 00:07:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:35,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749373345] [2020-10-26 00:07:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195295095] [2020-10-26 00:07:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:35,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:07:35,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 00:07:35,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:35,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:35,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:35,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-26 00:07:35,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407737806] [2020-10-26 00:07:35,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 00:07:35,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 00:07:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 00:07:35,868 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-26 00:07:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:36,051 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-26 00:07:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 00:07:36,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-26 00:07:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:36,052 INFO L225 Difference]: With dead ends: 63 [2020-10-26 00:07:36,052 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 00:07:36,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-26 00:07:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 00:07:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-26 00:07:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 00:07:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-26 00:07:36,058 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-26 00:07:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:36,058 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-26 00:07:36,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 00:07:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-26 00:07:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-26 00:07:36,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:36,059 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:36,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-26 00:07:36,272 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-26 00:07:36,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:36,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120677938] [2020-10-26 00:07:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:36,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120677938] [2020-10-26 00:07:36,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944808233] [2020-10-26 00:07:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:36,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:07:36,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 00:07:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:36,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:36,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:36,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-26 00:07:36,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311432408] [2020-10-26 00:07:36,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 00:07:36,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 00:07:36,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-26 00:07:36,519 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-26 00:07:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:36,653 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-26 00:07:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 00:07:36,653 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-26 00:07:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:36,654 INFO L225 Difference]: With dead ends: 56 [2020-10-26 00:07:36,654 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 00:07:36,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-26 00:07:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 00:07:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-26 00:07:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 00:07:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-26 00:07:36,663 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-26 00:07:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:36,664 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-26 00:07:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 00:07:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-26 00:07:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:07:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:36,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:36,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:36,881 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-26 00:07:36,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:36,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006859914] [2020-10-26 00:07:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:36,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006859914] [2020-10-26 00:07:36,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66112854] [2020-10-26 00:07:36,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:37,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-26 00:07:37,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-26 00:07:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:37,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:37,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:37,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-26 00:07:37,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552878304] [2020-10-26 00:07:37,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 00:07:37,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 00:07:37,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 00:07:37,092 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-26 00:07:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:37,222 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-26 00:07:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 00:07:37,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-26 00:07:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:37,223 INFO L225 Difference]: With dead ends: 56 [2020-10-26 00:07:37,223 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 00:07:37,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-26 00:07:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 00:07:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-26 00:07:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 00:07:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-26 00:07:37,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-26 00:07:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:37,228 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-26 00:07:37,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 00:07:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-26 00:07:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:07:37,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:37,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:37,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:37,441 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-26 00:07:37,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:37,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911933293] [2020-10-26 00:07:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911933293] [2020-10-26 00:07:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846631580] [2020-10-26 00:07:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-26 00:07:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:37,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:37,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:37,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-26 00:07:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093270054] [2020-10-26 00:07:37,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 00:07:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 00:07:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:07:37,695 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-26 00:07:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:37,970 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-26 00:07:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 00:07:37,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-26 00:07:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:37,972 INFO L225 Difference]: With dead ends: 63 [2020-10-26 00:07:37,972 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 00:07:37,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-26 00:07:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 00:07:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-26 00:07:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 00:07:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-26 00:07:37,981 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-26 00:07:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:37,981 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-26 00:07:37,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 00:07:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-26 00:07:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:07:37,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:37,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:38,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:38,191 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-26 00:07:38,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:38,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042768325] [2020-10-26 00:07:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042768325] [2020-10-26 00:07:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012815272] [2020-10-26 00:07:38,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:38,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:07:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-26 00:07:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:38,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:38,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-26 00:07:38,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514186438] [2020-10-26 00:07:38,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 00:07:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 00:07:38,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:07:38,409 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-26 00:07:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:38,590 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-26 00:07:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 00:07:38,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-26 00:07:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:38,591 INFO L225 Difference]: With dead ends: 71 [2020-10-26 00:07:38,591 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 00:07:38,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-26 00:07:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 00:07:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-26 00:07:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 00:07:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-26 00:07:38,605 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-26 00:07:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:38,605 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-26 00:07:38,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 00:07:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-26 00:07:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 00:07:38,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:38,611 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:38,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-26 00:07:38,822 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-26 00:07:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:38,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093932995] [2020-10-26 00:07:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093932995] [2020-10-26 00:07:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013567988] [2020-10-26 00:07:38,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:39,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-26 00:07:39,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-26 00:07:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:39,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:39,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:39,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-26 00:07:39,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449682102] [2020-10-26 00:07:39,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 00:07:39,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:39,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 00:07:39,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 00:07:39,107 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-26 00:07:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:39,424 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-26 00:07:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 00:07:39,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-26 00:07:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:39,425 INFO L225 Difference]: With dead ends: 72 [2020-10-26 00:07:39,425 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 00:07:39,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-26 00:07:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 00:07:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-26 00:07:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 00:07:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-26 00:07:39,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-26 00:07:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:39,429 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-26 00:07:39,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 00:07:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-26 00:07:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 00:07:39,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:39,430 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:39,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:39,631 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-26 00:07:39,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:39,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473445963] [2020-10-26 00:07:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473445963] [2020-10-26 00:07:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713511659] [2020-10-26 00:07:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:39,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:07:39,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-26 00:07:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:39,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:39,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:39,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-26 00:07:39,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097275317] [2020-10-26 00:07:39,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 00:07:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 00:07:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 00:07:39,904 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-26 00:07:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:40,162 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-26 00:07:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 00:07:40,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-26 00:07:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:40,164 INFO L225 Difference]: With dead ends: 64 [2020-10-26 00:07:40,164 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 00:07:40,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-26 00:07:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 00:07:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-26 00:07:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 00:07:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-26 00:07:40,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-26 00:07:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:40,169 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-26 00:07:40,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 00:07:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-26 00:07:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 00:07:40,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:40,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:40,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:40,379 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-26 00:07:40,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:40,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053659213] [2020-10-26 00:07:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:40,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053659213] [2020-10-26 00:07:40,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272674218] [2020-10-26 00:07:40,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:40,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-26 00:07:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 00:07:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:40,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:40,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:40,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-26 00:07:40,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357270876] [2020-10-26 00:07:40,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 00:07:40,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 00:07:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 00:07:40,612 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-26 00:07:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:40,795 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-26 00:07:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 00:07:40,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-26 00:07:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:40,797 INFO L225 Difference]: With dead ends: 64 [2020-10-26 00:07:40,797 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 00:07:40,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-26 00:07:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 00:07:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-26 00:07:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 00:07:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-26 00:07:40,802 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-26 00:07:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:40,803 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-26 00:07:40,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 00:07:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-26 00:07:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 00:07:40,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:40,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:41,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-26 00:07:41,005 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-26 00:07:41,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:41,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373793057] [2020-10-26 00:07:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373793057] [2020-10-26 00:07:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668665450] [2020-10-26 00:07:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:41,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-26 00:07:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:41,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 00:07:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:41,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:41,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:41,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-26 00:07:41,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375401628] [2020-10-26 00:07:41,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 00:07:41,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 00:07:41,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-26 00:07:41,274 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-26 00:07:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:41,649 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-26 00:07:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 00:07:41,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-26 00:07:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:41,650 INFO L225 Difference]: With dead ends: 73 [2020-10-26 00:07:41,650 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 00:07:41,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-26 00:07:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 00:07:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-26 00:07:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 00:07:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-26 00:07:41,654 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-26 00:07:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:41,654 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-26 00:07:41,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 00:07:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-26 00:07:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 00:07:41,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:41,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:41,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:41,864 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-26 00:07:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:41,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594331959] [2020-10-26 00:07:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594331959] [2020-10-26 00:07:41,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137962103] [2020-10-26 00:07:41,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:42,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 00:07:42,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:42,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:42,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:42,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-26 00:07:42,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771278763] [2020-10-26 00:07:42,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 00:07:42,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:42,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 00:07:42,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-26 00:07:42,147 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-26 00:07:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:42,554 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-26 00:07:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 00:07:42,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-26 00:07:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:42,555 INFO L225 Difference]: With dead ends: 81 [2020-10-26 00:07:42,555 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 00:07:42,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-26 00:07:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 00:07:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-26 00:07:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 00:07:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-26 00:07:42,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-26 00:07:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:42,563 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-26 00:07:42,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 00:07:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-26 00:07:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 00:07:42,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:42,564 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:42,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-26 00:07:42,773 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-26 00:07:42,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:42,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662385202] [2020-10-26 00:07:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:42,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662385202] [2020-10-26 00:07:42,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484411619] [2020-10-26 00:07:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:42,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:07:42,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:42,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 00:07:42,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:42,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:42,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-26 00:07:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479549443] [2020-10-26 00:07:42,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 00:07:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 00:07:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 00:07:42,993 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-26 00:07:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:43,449 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-26 00:07:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 00:07:43,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-26 00:07:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:43,453 INFO L225 Difference]: With dead ends: 82 [2020-10-26 00:07:43,453 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 00:07:43,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-26 00:07:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 00:07:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-26 00:07:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 00:07:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-26 00:07:43,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-26 00:07:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:43,459 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-26 00:07:43,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 00:07:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-26 00:07:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 00:07:43,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:43,460 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:43,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-26 00:07:43,661 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-26 00:07:43,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:43,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110158604] [2020-10-26 00:07:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:43,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110158604] [2020-10-26 00:07:43,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356404896] [2020-10-26 00:07:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:43,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-26 00:07:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 00:07:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:43,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:43,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:43,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-26 00:07:43,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885211210] [2020-10-26 00:07:43,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 00:07:43,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:43,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 00:07:43,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-26 00:07:43,879 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-26 00:07:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:44,250 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-26 00:07:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 00:07:44,251 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-26 00:07:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:44,252 INFO L225 Difference]: With dead ends: 72 [2020-10-26 00:07:44,252 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 00:07:44,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-26 00:07:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 00:07:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-26 00:07:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 00:07:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-26 00:07:44,256 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-26 00:07:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:44,256 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-26 00:07:44,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 00:07:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-26 00:07:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 00:07:44,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:44,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:44,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-26 00:07:44,466 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-26 00:07:44,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:44,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183696424] [2020-10-26 00:07:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:44,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183696424] [2020-10-26 00:07:44,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048417781] [2020-10-26 00:07:44,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:44,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:07:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-26 00:07:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:44,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:44,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:44,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-26 00:07:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556365942] [2020-10-26 00:07:44,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 00:07:44,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 00:07:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 00:07:44,701 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-26 00:07:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:44,905 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-26 00:07:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 00:07:44,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-26 00:07:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:44,907 INFO L225 Difference]: With dead ends: 72 [2020-10-26 00:07:44,907 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 00:07:44,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-26 00:07:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 00:07:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-26 00:07:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 00:07:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-26 00:07:44,912 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-26 00:07:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:44,912 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-26 00:07:44,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 00:07:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-26 00:07:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 00:07:44,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:44,913 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:45,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-26 00:07:45,123 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-26 00:07:45,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:45,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797990825] [2020-10-26 00:07:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797990825] [2020-10-26 00:07:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910968137] [2020-10-26 00:07:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:45,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-26 00:07:45,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 00:07:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:45,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:45,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:45,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-26 00:07:45,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637322557] [2020-10-26 00:07:45,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 00:07:45,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 00:07:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-26 00:07:45,374 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-26 00:07:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:45,877 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-26 00:07:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 00:07:45,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-26 00:07:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:45,878 INFO L225 Difference]: With dead ends: 83 [2020-10-26 00:07:45,878 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 00:07:45,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-26 00:07:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 00:07:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-26 00:07:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 00:07:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-26 00:07:45,883 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-26 00:07:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:45,883 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-26 00:07:45,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 00:07:45,884 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-26 00:07:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 00:07:45,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:45,885 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:46,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:46,095 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-26 00:07:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:46,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171473812] [2020-10-26 00:07:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:46,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171473812] [2020-10-26 00:07:46,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302103824] [2020-10-26 00:07:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:46,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-26 00:07:46,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:46,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 00:07:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:46,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:46,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:46,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-26 00:07:46,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426703015] [2020-10-26 00:07:46,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 00:07:46,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 00:07:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-26 00:07:46,324 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-26 00:07:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:46,850 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-26 00:07:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 00:07:46,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-26 00:07:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:46,852 INFO L225 Difference]: With dead ends: 91 [2020-10-26 00:07:46,852 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 00:07:46,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-26 00:07:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 00:07:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-26 00:07:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 00:07:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-26 00:07:46,856 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-26 00:07:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:46,856 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-26 00:07:46,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 00:07:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-26 00:07:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 00:07:46,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:46,857 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:47,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:47,067 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:47,068 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-26 00:07:47,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:47,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975749923] [2020-10-26 00:07:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975749923] [2020-10-26 00:07:47,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751751355] [2020-10-26 00:07:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-26 00:07:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:47,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:47,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:47,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-26 00:07:47,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677523616] [2020-10-26 00:07:47,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 00:07:47,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:47,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 00:07:47,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-26 00:07:47,319 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-26 00:07:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:47,938 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-26 00:07:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 00:07:47,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-26 00:07:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:47,941 INFO L225 Difference]: With dead ends: 92 [2020-10-26 00:07:47,941 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 00:07:47,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 00:07:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 00:07:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-26 00:07:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 00:07:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-26 00:07:47,948 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-26 00:07:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:47,950 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-26 00:07:47,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 00:07:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-26 00:07:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 00:07:47,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:47,951 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:48,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:48,153 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-26 00:07:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:48,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479938074] [2020-10-26 00:07:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:48,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479938074] [2020-10-26 00:07:48,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178748429] [2020-10-26 00:07:48,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:48,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:07:48,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-26 00:07:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:48,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:48,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:48,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-26 00:07:48,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585229496] [2020-10-26 00:07:48,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 00:07:48,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:48,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 00:07:48,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 00:07:48,425 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-26 00:07:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:48,931 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-26 00:07:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 00:07:48,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-26 00:07:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:48,933 INFO L225 Difference]: With dead ends: 80 [2020-10-26 00:07:48,933 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 00:07:48,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-26 00:07:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 00:07:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-26 00:07:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 00:07:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-26 00:07:48,940 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-26 00:07:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:48,940 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-26 00:07:48,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 00:07:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-26 00:07:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 00:07:48,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:48,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:49,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-26 00:07:49,146 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-26 00:07:49,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:49,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13653185] [2020-10-26 00:07:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:49,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13653185] [2020-10-26 00:07:49,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235690108] [2020-10-26 00:07:49,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:49,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-26 00:07:49,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-26 00:07:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:49,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:49,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:49,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-26 00:07:49,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168704130] [2020-10-26 00:07:49,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 00:07:49,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:49,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 00:07:49,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-26 00:07:49,437 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-26 00:07:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:49,713 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-26 00:07:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 00:07:49,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-26 00:07:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:49,715 INFO L225 Difference]: With dead ends: 80 [2020-10-26 00:07:49,715 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 00:07:49,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-26 00:07:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 00:07:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-26 00:07:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 00:07:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-26 00:07:49,719 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-26 00:07:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:49,719 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-26 00:07:49,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 00:07:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-26 00:07:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 00:07:49,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:49,720 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:49,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-26 00:07:49,930 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:49,930 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-26 00:07:49,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:49,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858367754] [2020-10-26 00:07:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:50,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858367754] [2020-10-26 00:07:50,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579553161] [2020-10-26 00:07:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:50,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:07:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:50,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-26 00:07:50,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:50,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:50,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:50,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-26 00:07:50,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722859485] [2020-10-26 00:07:50,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 00:07:50,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 00:07:50,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-26 00:07:50,192 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-26 00:07:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:50,826 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-26 00:07:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 00:07:50,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-26 00:07:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:50,827 INFO L225 Difference]: With dead ends: 93 [2020-10-26 00:07:50,827 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 00:07:50,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 00:07:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 00:07:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-26 00:07:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 00:07:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-26 00:07:50,831 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-26 00:07:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:50,832 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-26 00:07:50,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 00:07:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-26 00:07:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 00:07:50,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:50,832 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:51,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-26 00:07:51,033 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-26 00:07:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:51,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864063309] [2020-10-26 00:07:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864063309] [2020-10-26 00:07:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186556243] [2020-10-26 00:07:51,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:51,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-26 00:07:51,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-26 00:07:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:51,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:51,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:51,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-26 00:07:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092388961] [2020-10-26 00:07:51,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 00:07:51,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 00:07:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-26 00:07:51,284 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-26 00:07:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:51,981 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-26 00:07:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 00:07:51,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-26 00:07:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:51,983 INFO L225 Difference]: With dead ends: 101 [2020-10-26 00:07:51,983 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 00:07:51,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 00:07:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 00:07:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-26 00:07:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 00:07:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-26 00:07:51,988 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-26 00:07:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:51,988 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-26 00:07:51,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 00:07:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-26 00:07:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:07:51,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:51,989 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:52,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-26 00:07:52,198 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-26 00:07:52,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:52,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837388988] [2020-10-26 00:07:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837388988] [2020-10-26 00:07:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877938252] [2020-10-26 00:07:52,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:52,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-26 00:07:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 00:07:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:52,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-26 00:07:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735752293] [2020-10-26 00:07:52,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 00:07:52,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 00:07:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-26 00:07:52,479 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-26 00:07:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:53,218 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-26 00:07:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 00:07:53,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-26 00:07:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:53,219 INFO L225 Difference]: With dead ends: 102 [2020-10-26 00:07:53,219 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 00:07:53,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 00:07:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 00:07:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-26 00:07:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 00:07:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-26 00:07:53,223 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-26 00:07:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:53,224 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-26 00:07:53,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 00:07:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-26 00:07:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:07:53,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:53,224 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:53,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-26 00:07:53,429 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-26 00:07:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:53,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824903265] [2020-10-26 00:07:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:53,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824903265] [2020-10-26 00:07:53,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431821132] [2020-10-26 00:07:53,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-26 00:07:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:53,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:53,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:53,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-26 00:07:53,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964364778] [2020-10-26 00:07:53,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 00:07:53,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 00:07:53,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-26 00:07:53,717 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-26 00:07:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:54,372 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-26 00:07:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 00:07:54,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-26 00:07:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:54,376 INFO L225 Difference]: With dead ends: 88 [2020-10-26 00:07:54,376 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 00:07:54,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 00:07:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 00:07:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-26 00:07:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 00:07:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-26 00:07:54,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-26 00:07:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:54,382 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-26 00:07:54,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 00:07:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-26 00:07:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 00:07:54,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:54,385 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:54,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:54,586 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-26 00:07:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:54,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906934872] [2020-10-26 00:07:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:54,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906934872] [2020-10-26 00:07:54,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292530094] [2020-10-26 00:07:54,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 00:07:54,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:07:54,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:54,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-26 00:07:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:54,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:54,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:54,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-26 00:07:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078736985] [2020-10-26 00:07:54,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 00:07:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 00:07:54,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 00:07:54,920 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-26 00:07:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:55,288 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-26 00:07:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 00:07:55,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-26 00:07:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:55,289 INFO L225 Difference]: With dead ends: 88 [2020-10-26 00:07:55,289 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 00:07:55,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-10-26 00:07:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 00:07:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-26 00:07:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 00:07:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-26 00:07:55,293 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-26 00:07:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:55,293 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-26 00:07:55,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 00:07:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-26 00:07:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 00:07:55,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:55,294 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:55,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-26 00:07:55,502 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-26 00:07:55,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:55,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371148990] [2020-10-26 00:07:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:55,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371148990] [2020-10-26 00:07:55,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52694911] [2020-10-26 00:07:55,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:55,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-26 00:07:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 00:07:55,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:55,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:07:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:55,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:55,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-26 00:07:55,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056666198] [2020-10-26 00:07:55,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 00:07:55,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:55,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 00:07:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-26 00:07:55,798 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-26 00:07:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:56,633 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-26 00:07:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 00:07:56,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-26 00:07:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:56,635 INFO L225 Difference]: With dead ends: 103 [2020-10-26 00:07:56,636 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 00:07:56,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 00:07:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 00:07:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-26 00:07:56,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 00:07:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-26 00:07:56,640 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-26 00:07:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:56,641 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-26 00:07:56,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 00:07:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-26 00:07:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 00:07:56,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:56,641 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:56,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-26 00:07:56,853 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-26 00:07:56,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:56,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070427293] [2020-10-26 00:07:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:57,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070427293] [2020-10-26 00:07:57,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114748239] [2020-10-26 00:07:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:57,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:07:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 00:07:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:57,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:57,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:57,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-26 00:07:57,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320078482] [2020-10-26 00:07:57,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 00:07:57,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:57,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 00:07:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-26 00:07:57,137 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-26 00:07:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:58,011 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-26 00:07:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 00:07:58,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-26 00:07:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:58,013 INFO L225 Difference]: With dead ends: 111 [2020-10-26 00:07:58,013 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 00:07:58,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 00:07:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 00:07:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-26 00:07:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 00:07:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-26 00:07:58,018 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-26 00:07:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:58,018 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-26 00:07:58,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 00:07:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-26 00:07:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 00:07:58,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:58,019 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:58,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:58,230 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-26 00:07:58,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:58,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281436218] [2020-10-26 00:07:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:58,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281436218] [2020-10-26 00:07:58,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469328592] [2020-10-26 00:07:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:58,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-26 00:07:58,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-26 00:07:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:58,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:07:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:58,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:07:58,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-26 00:07:58,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208433494] [2020-10-26 00:07:58,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 00:07:58,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 00:07:58,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-26 00:07:58,521 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-26 00:07:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:59,456 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-26 00:07:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 00:07:59,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-26 00:07:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:59,460 INFO L225 Difference]: With dead ends: 112 [2020-10-26 00:07:59,460 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 00:07:59,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 00:07:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 00:07:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-26 00:07:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 00:07:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-26 00:07:59,468 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-26 00:07:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:59,469 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-26 00:07:59,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 00:07:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-26 00:07:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 00:07:59,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:59,470 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:59,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:59,681 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:07:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:59,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-26 00:07:59,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:59,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117228044] [2020-10-26 00:07:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:59,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117228044] [2020-10-26 00:07:59,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793985105] [2020-10-26 00:07:59,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:07:59,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-26 00:07:59,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:07:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-26 00:07:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:07:59,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:00,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:00,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-26 00:08:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694998003] [2020-10-26 00:08:00,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 00:08:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 00:08:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-26 00:08:00,008 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-26 00:08:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:00,848 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-26 00:08:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 00:08:00,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-26 00:08:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:00,850 INFO L225 Difference]: With dead ends: 96 [2020-10-26 00:08:00,850 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 00:08:00,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 00:08:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 00:08:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-26 00:08:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 00:08:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-26 00:08:00,853 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-26 00:08:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,854 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-26 00:08:00,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 00:08:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-26 00:08:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 00:08:00,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:00,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:01,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-26 00:08:01,063 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:01,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-26 00:08:01,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:01,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108997345] [2020-10-26 00:08:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:01,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108997345] [2020-10-26 00:08:01,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976679196] [2020-10-26 00:08:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:01,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-26 00:08:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:01,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:01,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:01,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-26 00:08:01,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909311032] [2020-10-26 00:08:01,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 00:08:01,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 00:08:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-26 00:08:01,430 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-26 00:08:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:01,861 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-26 00:08:01,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 00:08:01,863 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-26 00:08:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:01,864 INFO L225 Difference]: With dead ends: 96 [2020-10-26 00:08:01,864 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 00:08:01,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 00:08:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 00:08:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-26 00:08:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 00:08:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-26 00:08:01,875 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-26 00:08:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:01,875 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-26 00:08:01,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 00:08:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-26 00:08:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 00:08:01,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:01,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:02,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:02,087 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-26 00:08:02,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:02,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944218615] [2020-10-26 00:08:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944218615] [2020-10-26 00:08:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540169195] [2020-10-26 00:08:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:02,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:08:02,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 00:08:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:02,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:02,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-26 00:08:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817066320] [2020-10-26 00:08:02,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 00:08:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:02,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 00:08:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-26 00:08:02,412 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-26 00:08:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:03,438 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-26 00:08:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 00:08:03,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-26 00:08:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:03,439 INFO L225 Difference]: With dead ends: 113 [2020-10-26 00:08:03,439 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 00:08:03,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 00:08:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 00:08:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-26 00:08:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 00:08:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-26 00:08:03,444 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-26 00:08:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:03,444 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-26 00:08:03,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 00:08:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-26 00:08:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 00:08:03,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:03,445 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:03,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-26 00:08:03,654 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-26 00:08:03,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:03,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467757705] [2020-10-26 00:08:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:03,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467757705] [2020-10-26 00:08:03,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309041577] [2020-10-26 00:08:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:03,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-26 00:08:03,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:03,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-26 00:08:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:03,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:03,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-26 00:08:04,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647781079] [2020-10-26 00:08:04,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 00:08:04,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 00:08:04,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-26 00:08:04,001 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-26 00:08:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:04,994 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-26 00:08:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 00:08:04,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-26 00:08:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:04,996 INFO L225 Difference]: With dead ends: 121 [2020-10-26 00:08:04,996 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 00:08:04,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 00:08:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 00:08:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-26 00:08:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 00:08:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-26 00:08:05,001 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-26 00:08:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:05,001 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-26 00:08:05,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 00:08:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-26 00:08:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 00:08:05,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:05,002 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:05,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:05,204 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:05,204 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-26 00:08:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:05,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225196376] [2020-10-26 00:08:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:05,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225196376] [2020-10-26 00:08:05,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886152069] [2020-10-26 00:08:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:05,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:08:05,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-26 00:08:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:05,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:08:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:05,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:05,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-26 00:08:05,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51872288] [2020-10-26 00:08:05,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 00:08:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 00:08:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-26 00:08:05,565 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-26 00:08:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:06,644 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-26 00:08:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 00:08:06,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-26 00:08:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:06,646 INFO L225 Difference]: With dead ends: 122 [2020-10-26 00:08:06,646 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 00:08:06,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 00:08:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 00:08:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-26 00:08:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 00:08:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-26 00:08:06,651 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-26 00:08:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:06,651 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-26 00:08:06,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 00:08:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-26 00:08:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 00:08:06,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:06,651 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:06,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-26 00:08:06,862 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-26 00:08:06,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:06,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535904369] [2020-10-26 00:08:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535904369] [2020-10-26 00:08:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481146501] [2020-10-26 00:08:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:07,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-26 00:08:07,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-26 00:08:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:07,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:07,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:07,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-26 00:08:07,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347364729] [2020-10-26 00:08:07,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 00:08:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 00:08:07,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-26 00:08:07,212 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-26 00:08:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:08,339 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-26 00:08:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 00:08:08,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-26 00:08:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:08,341 INFO L225 Difference]: With dead ends: 104 [2020-10-26 00:08:08,342 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 00:08:08,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 00:08:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 00:08:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-26 00:08:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 00:08:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-26 00:08:08,347 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-26 00:08:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:08,347 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-26 00:08:08,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 00:08:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-26 00:08:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 00:08:08,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:08,348 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:08,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-26 00:08:08,557 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:08,558 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-26 00:08:08,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:08,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416487833] [2020-10-26 00:08:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416487833] [2020-10-26 00:08:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003417666] [2020-10-26 00:08:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:08,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-26 00:08:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:08,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 00:08:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:08,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:08,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:08,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-26 00:08:08,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356531157] [2020-10-26 00:08:08,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 00:08:08,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:08,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 00:08:08,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-26 00:08:08,977 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-26 00:08:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:09,550 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-26 00:08:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 00:08:09,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-26 00:08:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:09,552 INFO L225 Difference]: With dead ends: 104 [2020-10-26 00:08:09,552 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 00:08:09,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 00:08:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 00:08:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-26 00:08:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 00:08:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-26 00:08:09,557 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-26 00:08:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:09,557 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-26 00:08:09,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 00:08:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-26 00:08:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 00:08:09,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:09,558 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:09,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-26 00:08:09,761 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-26 00:08:09,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:09,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136659385] [2020-10-26 00:08:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:09,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136659385] [2020-10-26 00:08:09,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378248069] [2020-10-26 00:08:09,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-26 00:08:10,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:10,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:10,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:10,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-26 00:08:10,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711053244] [2020-10-26 00:08:10,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 00:08:10,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 00:08:10,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-26 00:08:10,106 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-26 00:08:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:11,344 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-26 00:08:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 00:08:11,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-26 00:08:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:11,346 INFO L225 Difference]: With dead ends: 123 [2020-10-26 00:08:11,347 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 00:08:11,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 00:08:11,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 00:08:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-26 00:08:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 00:08:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-26 00:08:11,352 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-26 00:08:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:11,352 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-26 00:08:11,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 00:08:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-26 00:08:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 00:08:11,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:11,353 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:11,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-26 00:08:11,564 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-26 00:08:11,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:11,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024149622] [2020-10-26 00:08:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:11,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024149622] [2020-10-26 00:08:11,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605216159] [2020-10-26 00:08:11,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:11,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:08:11,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:11,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 00:08:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:11,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:11,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-26 00:08:11,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654048809] [2020-10-26 00:08:11,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 00:08:11,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 00:08:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-26 00:08:11,951 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-26 00:08:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:13,125 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-26 00:08:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 00:08:13,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-26 00:08:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:13,128 INFO L225 Difference]: With dead ends: 131 [2020-10-26 00:08:13,128 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 00:08:13,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 00:08:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 00:08:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-26 00:08:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 00:08:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-26 00:08:13,135 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-26 00:08:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:13,135 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-26 00:08:13,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 00:08:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-26 00:08:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 00:08:13,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:13,137 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:13,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-26 00:08:13,346 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-26 00:08:13,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:13,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055729239] [2020-10-26 00:08:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:13,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055729239] [2020-10-26 00:08:13,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421931123] [2020-10-26 00:08:13,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:13,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-26 00:08:13,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 00:08:13,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:13,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:08:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:13,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:13,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-26 00:08:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052844480] [2020-10-26 00:08:13,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 00:08:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 00:08:13,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-26 00:08:13,752 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-26 00:08:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:15,130 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-26 00:08:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 00:08:15,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-26 00:08:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:15,132 INFO L225 Difference]: With dead ends: 132 [2020-10-26 00:08:15,132 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 00:08:15,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 00:08:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 00:08:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-26 00:08:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 00:08:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-26 00:08:15,137 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-26 00:08:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:15,137 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-26 00:08:15,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 00:08:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-26 00:08:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 00:08:15,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:15,138 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:15,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-26 00:08:15,349 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:15,350 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-26 00:08:15,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:15,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276619498] [2020-10-26 00:08:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:15,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276619498] [2020-10-26 00:08:15,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657850502] [2020-10-26 00:08:15,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:15,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-26 00:08:15,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-26 00:08:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:15,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:15,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:15,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-26 00:08:15,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148877218] [2020-10-26 00:08:15,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 00:08:15,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 00:08:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-26 00:08:15,747 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-26 00:08:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:17,043 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-26 00:08:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 00:08:17,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-26 00:08:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:17,045 INFO L225 Difference]: With dead ends: 112 [2020-10-26 00:08:17,045 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 00:08:17,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 00:08:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 00:08:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-26 00:08:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 00:08:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-26 00:08:17,050 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-26 00:08:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:17,050 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-26 00:08:17,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 00:08:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-26 00:08:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 00:08:17,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:17,051 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:17,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-26 00:08:17,252 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-26 00:08:17,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:17,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870091197] [2020-10-26 00:08:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:17,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870091197] [2020-10-26 00:08:17,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19383825] [2020-10-26 00:08:17,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:17,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-26 00:08:17,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:17,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-26 00:08:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:17,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:17,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:17,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-26 00:08:17,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815246344] [2020-10-26 00:08:17,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 00:08:17,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 00:08:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-26 00:08:17,718 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-26 00:08:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:18,353 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-26 00:08:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 00:08:18,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-26 00:08:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:18,355 INFO L225 Difference]: With dead ends: 112 [2020-10-26 00:08:18,355 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 00:08:18,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 00:08:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 00:08:18,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-26 00:08:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 00:08:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-26 00:08:18,360 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-26 00:08:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:18,361 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-26 00:08:18,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 00:08:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-26 00:08:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 00:08:18,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:18,361 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:18,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:18,573 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-26 00:08:18,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:18,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322689536] [2020-10-26 00:08:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:18,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322689536] [2020-10-26 00:08:18,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041752586] [2020-10-26 00:08:18,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:18,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-26 00:08:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-26 00:08:18,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:18,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:19,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:19,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-26 00:08:19,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239471319] [2020-10-26 00:08:19,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 00:08:19,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:19,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 00:08:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-26 00:08:19,003 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-26 00:08:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:20,426 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-26 00:08:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 00:08:20,432 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-26 00:08:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:20,433 INFO L225 Difference]: With dead ends: 133 [2020-10-26 00:08:20,433 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 00:08:20,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 00:08:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 00:08:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-26 00:08:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 00:08:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-26 00:08:20,440 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-26 00:08:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:20,440 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-26 00:08:20,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 00:08:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-26 00:08:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 00:08:20,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:20,441 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:20,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-26 00:08:20,652 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-26 00:08:20,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127995472] [2020-10-26 00:08:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:20,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127995472] [2020-10-26 00:08:20,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796350364] [2020-10-26 00:08:20,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-26 00:08:21,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:21,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:08:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:21,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:21,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-26 00:08:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767165664] [2020-10-26 00:08:21,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 00:08:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 00:08:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-26 00:08:21,051 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-26 00:08:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:22,581 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-26 00:08:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 00:08:22,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-26 00:08:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:22,584 INFO L225 Difference]: With dead ends: 141 [2020-10-26 00:08:22,584 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 00:08:22,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 00:08:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 00:08:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-26 00:08:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 00:08:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-26 00:08:22,589 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-26 00:08:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:22,589 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-26 00:08:22,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 00:08:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-26 00:08:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 00:08:22,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:22,590 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:22,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:22,802 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-26 00:08:22,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:22,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755322954] [2020-10-26 00:08:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:23,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755322954] [2020-10-26 00:08:23,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255004265] [2020-10-26 00:08:23,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:23,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 00:08:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-26 00:08:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:23,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-26 00:08:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:23,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:23,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-26 00:08:23,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499981065] [2020-10-26 00:08:23,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 00:08:23,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 00:08:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-26 00:08:23,253 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-26 00:08:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:24,870 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-26 00:08:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 00:08:24,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-26 00:08:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:24,873 INFO L225 Difference]: With dead ends: 142 [2020-10-26 00:08:24,873 INFO L226 Difference]: Without dead ends: 133 [2020-10-26 00:08:24,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 00:08:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-26 00:08:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-26 00:08:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 00:08:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-26 00:08:24,878 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-26 00:08:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:24,879 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-26 00:08:24,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 00:08:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-26 00:08:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 00:08:24,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:24,880 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:25,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-26 00:08:25,090 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-26 00:08:25,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:25,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982470666] [2020-10-26 00:08:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:25,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982470666] [2020-10-26 00:08:25,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972521403] [2020-10-26 00:08:25,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:25,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-26 00:08:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 00:08:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-26 00:08:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 00:08:25,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 00:08:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:25,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 00:08:25,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-26 00:08:25,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693091872] [2020-10-26 00:08:25,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 00:08:25,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 00:08:25,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-26 00:08:25,532 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-26 00:08:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:27,112 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-26 00:08:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 00:08:27,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-26 00:08:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:27,114 INFO L225 Difference]: With dead ends: 120 [2020-10-26 00:08:27,114 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 00:08:27,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 00:08:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 00:08:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-26 00:08:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 00:08:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-26 00:08:27,118 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-26 00:08:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:27,118 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-26 00:08:27,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 00:08:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-26 00:08:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 00:08:27,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:27,119 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:27,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 00:08:27,329 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-26 00:08:27,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:27,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598607165] [2020-10-26 00:08:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 00:08:27,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 00:08:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 00:08:27,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 00:08:27,411 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 00:08:27,411 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 00:08:27,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 00:08:27,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:08:27 BasicIcfg [2020-10-26 00:08:27,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:08:27,518 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:08:27,518 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:08:27,518 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:08:27,519 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:32" (3/4) ... [2020-10-26 00:08:27,521 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-26 00:08:27,610 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:08:27,610 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:08:27,611 INFO L168 Benchmark]: Toolchain (without parser) took 56923.08 ms. Allocated memory was 48.2 MB in the beginning and 167.8 MB in the end (delta: 119.5 MB). Free memory was 31.1 MB in the beginning and 69.5 MB in the end (delta: -38.4 MB). Peak memory consumption was 82.7 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:27,612 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 39.8 MB. Free memory was 18.1 MB in the beginning and 18.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:27,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 697.68 ms. Allocated memory is still 48.2 MB. Free memory was 30.4 MB in the beginning and 30.2 MB in the end (delta: 181.6 kB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:27,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.76 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 28.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:27,615 INFO L168 Benchmark]: Boogie Preprocessor took 31.35 ms. Allocated memory is still 48.2 MB. Free memory was 28.2 MB in the beginning and 26.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:27,615 INFO L168 Benchmark]: RCFGBuilder took 544.37 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 26.9 MB in the beginning and 31.6 MB in the end (delta: -4.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:27,616 INFO L168 Benchmark]: TraceAbstraction took 55494.23 ms. Allocated memory was 62.9 MB in the beginning and 167.8 MB in the end (delta: 104.9 MB). Free memory was 31.0 MB in the beginning and 76.8 MB in the end (delta: -45.8 MB). Peak memory consumption was 58.2 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:27,616 INFO L168 Benchmark]: Witness Printer took 92.66 ms. Allocated memory is still 167.8 MB. Free memory was 76.8 MB in the beginning and 69.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:27,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 39.8 MB. Free memory was 18.1 MB in the beginning and 18.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 697.68 ms. Allocated memory is still 48.2 MB. Free memory was 30.4 MB in the beginning and 30.2 MB in the end (delta: 181.6 kB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.76 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 28.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.35 ms. Allocated memory is still 48.2 MB. Free memory was 28.2 MB in the beginning and 26.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 544.37 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 26.9 MB in the beginning and 31.6 MB in the end (delta: -4.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 55494.23 ms. Allocated memory was 62.9 MB in the beginning and 167.8 MB in the end (delta: 104.9 MB). Free memory was 31.0 MB in the beginning and 76.8 MB in the end (delta: -45.8 MB). Peak memory consumption was 58.2 MB. Max. memory is 16.1 GB. * Witness Printer took 92.66 ms. Allocated memory is still 167.8 MB. Free memory was 76.8 MB in the beginning and 69.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.2s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L711] 0 int condJ = j >= (2*10 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longer-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 55.2s, OverallIterations: 48, TraceHistogramMax: 10, AutomataDifference: 30.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 734 SDtfs, 2945 SDslu, 3072 SDs, 0 SdLazy, 3707 SolverSat, 2422 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2184 GetRequests, 688 SyntacticMatches, 34 SemanticMatches, 1462 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14700 ImplicationChecksByTransitivity, 29.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=47, 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, 47 MinimizatonAttempts, 1162 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 1668 NumberOfCodeBlocks, 1668 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 1551 ConstructedInterpolants, 0 QuantifiedInterpolants, 122223 SizeOfPredicates, 470 NumberOfNonLiveVariables, 5586 ConjunctsInSsa, 643 ConjunctsInUnsatCore, 89 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2580 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...