./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c --full-output -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 df91a67debf699bee0edd6df4b6eba5d1e6f3f03 -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 23:17:47,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 23:17:47,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 23:17:47,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 23:17:47,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 23:17:47,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 23:17:47,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 23:17:47,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 23:17:47,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 23:17:47,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 23:17:47,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 23:17:47,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 23:17:47,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 23:17:47,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 23:17:47,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 23:17:47,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 23:17:47,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 23:17:47,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 23:17:47,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 23:17:47,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 23:17:47,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 23:17:47,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 23:17:47,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 23:17:47,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 23:17:47,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 23:17:47,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 23:17:47,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 23:17:47,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 23:17:47,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 23:17:47,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 23:17:47,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 23:17:47,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 23:17:47,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 23:17:47,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 23:17:47,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 23:17:47,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 23:17:47,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 23:17:47,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 23:17:47,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 23:17:47,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 23:17:47,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 23:17:47,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 23:17:47,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 23:17:47,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 23:17:47,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 23:17:47,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 23:17:47,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 23:17:47,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 23:17:47,156 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 23:17:47,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 23:17:47,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 23:17:47,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 23:17:47,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 23:17:47,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 23:17:47,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 23:17:47,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 23:17:47,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 23:17:47,159 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 23:17:47,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 23:17:47,159 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 23:17:47,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 23:17:47,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 23:17:47,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 23:17:47,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 23:17:47,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 23:17:47,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 23:17:47,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 23:17:47,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 23:17:47,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 23:17:47,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 23:17:47,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 23:17:47,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 23:17:47,163 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df91a67debf699bee0edd6df4b6eba5d1e6f3f03 [2021-10-05 23:17:47,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 23:17:47,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 23:17:47,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 23:17:47,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 23:17:47,620 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 23:17:47,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-05 23:17:47,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12b4f1631/31ffa2c2fd4845d59fe1ef04cae78e8f/FLAG7845b2cd5 [2021-10-05 23:17:48,375 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 23:17:48,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-05 23:17:48,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12b4f1631/31ffa2c2fd4845d59fe1ef04cae78e8f/FLAG7845b2cd5 [2021-10-05 23:17:48,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12b4f1631/31ffa2c2fd4845d59fe1ef04cae78e8f [2021-10-05 23:17:48,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 23:17:48,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 23:17:48,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 23:17:48,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 23:17:48,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 23:17:48,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:17:48" (1/1) ... [2021-10-05 23:17:48,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24568f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:48, skipping insertion in model container [2021-10-05 23:17:48,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:17:48" (1/1) ... [2021-10-05 23:17:48,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 23:17:48,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 23:17:49,090 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c[4956,4969] [2021-10-05 23:17:49,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 23:17:49,110 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 23:17:49,150 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c[4956,4969] [2021-10-05 23:17:49,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 23:17:49,181 INFO L208 MainTranslator]: Completed translation [2021-10-05 23:17:49,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49 WrapperNode [2021-10-05 23:17:49,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 23:17:49,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 23:17:49,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 23:17:49,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 23:17:49,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 23:17:49,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 23:17:49,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 23:17:49,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 23:17:49,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 23:17:49,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 23:17:49,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 23:17:49,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 23:17:49,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (1/1) ... [2021-10-05 23:17:49,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 23:17:49,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:17:49,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 23:17:49,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 23:17:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 23:17:49,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 23:17:49,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 23:17:49,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 23:17:49,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-05 23:17:49,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-05 23:17:49,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 23:17:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 23:17:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 23:17:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 23:17:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 23:17:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-05 23:17:49,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 23:17:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 23:17:49,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 23:17:49,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 23:17:49,506 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 23:17:50,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 23:17:50,485 INFO L299 CfgBuilder]: Removed 48 assume(true) statements. [2021-10-05 23:17:50,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:17:50 BoogieIcfgContainer [2021-10-05 23:17:50,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 23:17:50,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 23:17:50,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 23:17:50,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 23:17:50,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:17:48" (1/3) ... [2021-10-05 23:17:50,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35b19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:17:50, skipping insertion in model container [2021-10-05 23:17:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:17:49" (2/3) ... [2021-10-05 23:17:50,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b35b19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:17:50, skipping insertion in model container [2021-10-05 23:17:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:17:50" (3/3) ... [2021-10-05 23:17:50,497 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.c [2021-10-05 23:17:50,503 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 23:17:50,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 23:17:50,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 23:17:50,504 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 23:17:50,541 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,541 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,543 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,543 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,543 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,543 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,544 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,544 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,545 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,545 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,547 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,549 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,550 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,552 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,557 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,559 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,559 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,559 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,560 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,560 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,560 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,561 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,561 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,561 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,562 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,563 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,564 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,564 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,565 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,566 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,566 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,566 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,566 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,567 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,567 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,567 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,568 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,568 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,568 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,568 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,569 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,569 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,570 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,570 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,570 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,571 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,572 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,574 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,590 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,592 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,593 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,595 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,595 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,595 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,595 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,598 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:17:50,606 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-05 23:17:50,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 23:17:50,686 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-05 23:17:50,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-05 23:17:50,713 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 23:17:50,726 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 225 transitions, 474 flow [2021-10-05 23:17:50,730 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 225 transitions, 474 flow [2021-10-05 23:17:50,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 225 transitions, 474 flow [2021-10-05 23:17:50,863 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2021-10-05 23:17:50,863 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-05 23:17:50,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 222 events. 24/222 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 187. Up to 6 conditions per place. [2021-10-05 23:17:50,873 INFO L116 LiptonReduction]: Number of co-enabled transitions 2196 [2021-10-05 23:18:01,897 INFO L131 LiptonReduction]: Checked pairs total: 2142 [2021-10-05 23:18:01,897 INFO L133 LiptonReduction]: Total number of compositions: 236 [2021-10-05 23:18:01,906 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 29 transitions, 82 flow [2021-10-05 23:18:01,922 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:18:01,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:01,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:01,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash 116542943, now seen corresponding path program 1 times [2021-10-05 23:18:01,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:01,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748054992] [2021-10-05 23:18:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:01,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:02,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:02,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748054992] [2021-10-05 23:18:02,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748054992] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:18:02,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:18:02,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-05 23:18:02,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32499669] [2021-10-05 23:18:02,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 23:18:02,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 23:18:02,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 23:18:02,422 INFO L87 Difference]: Start difference. First operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:02,462 INFO L93 Difference]: Finished difference Result 88 states and 251 transitions. [2021-10-05 23:18:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 23:18:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-05 23:18:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:02,477 INFO L225 Difference]: With dead ends: 88 [2021-10-05 23:18:02,478 INFO L226 Difference]: Without dead ends: 81 [2021-10-05 23:18:02,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 23:18:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-05 23:18:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-05 23:18:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.9125) internal successors, (233), 80 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 233 transitions. [2021-10-05 23:18:02,529 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 233 transitions. Word has length 19 [2021-10-05 23:18:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:02,529 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 233 transitions. [2021-10-05 23:18:02,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 233 transitions. [2021-10-05 23:18:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 23:18:02,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:02,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:02,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 23:18:02,533 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash -223462236, now seen corresponding path program 1 times [2021-10-05 23:18:02,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:02,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538740602] [2021-10-05 23:18:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:02,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:02,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:02,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538740602] [2021-10-05 23:18:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538740602] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:18:02,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:18:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 23:18:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316050943] [2021-10-05 23:18:02,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 23:18:02,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:02,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 23:18:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 23:18:02,773 INFO L87 Difference]: Start difference. First operand 81 states and 233 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:02,791 INFO L93 Difference]: Finished difference Result 77 states and 211 transitions. [2021-10-05 23:18:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 23:18:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-05 23:18:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:02,794 INFO L225 Difference]: With dead ends: 77 [2021-10-05 23:18:02,794 INFO L226 Difference]: Without dead ends: 75 [2021-10-05 23:18:02,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 23:18:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-05 23:18:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-05 23:18:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.7837837837837838) internal successors, (206), 74 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 206 transitions. [2021-10-05 23:18:02,807 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 206 transitions. Word has length 20 [2021-10-05 23:18:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:02,808 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 206 transitions. [2021-10-05 23:18:02,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 206 transitions. [2021-10-05 23:18:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 23:18:02,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:02,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:02,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 23:18:02,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -639279292, now seen corresponding path program 1 times [2021-10-05 23:18:02,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:02,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195600945] [2021-10-05 23:18:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:02,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:02,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:02,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195600945] [2021-10-05 23:18:02,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195600945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:18:02,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:18:02,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 23:18:02,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774653110] [2021-10-05 23:18:02,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 23:18:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 23:18:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 23:18:02,987 INFO L87 Difference]: Start difference. First operand 75 states and 206 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:03,050 INFO L93 Difference]: Finished difference Result 171 states and 449 transitions. [2021-10-05 23:18:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 23:18:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-05 23:18:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:03,054 INFO L225 Difference]: With dead ends: 171 [2021-10-05 23:18:03,054 INFO L226 Difference]: Without dead ends: 165 [2021-10-05 23:18:03,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 23:18:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-05 23:18:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-10-05 23:18:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.7596153846153846) internal successors, (287), 104 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 287 transitions. [2021-10-05 23:18:03,070 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 287 transitions. Word has length 20 [2021-10-05 23:18:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:03,071 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 287 transitions. [2021-10-05 23:18:03,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 287 transitions. [2021-10-05 23:18:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 23:18:03,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:03,073 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:03,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 23:18:03,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:03,075 INFO L82 PathProgramCache]: Analyzing trace with hash 785551347, now seen corresponding path program 1 times [2021-10-05 23:18:03,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:03,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986576462] [2021-10-05 23:18:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:03,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:03,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:03,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986576462] [2021-10-05 23:18:03,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986576462] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:18:03,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:18:03,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 23:18:03,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985635918] [2021-10-05 23:18:03,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 23:18:03,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 23:18:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:18:03,196 INFO L87 Difference]: Start difference. First operand 105 states and 287 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:03,233 INFO L93 Difference]: Finished difference Result 105 states and 255 transitions. [2021-10-05 23:18:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:18:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-05 23:18:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:03,235 INFO L225 Difference]: With dead ends: 105 [2021-10-05 23:18:03,236 INFO L226 Difference]: Without dead ends: 76 [2021-10-05 23:18:03,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:18:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-05 23:18:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-05 23:18:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.76) internal successors, (207), 75 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 207 transitions. [2021-10-05 23:18:03,244 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 207 transitions. Word has length 20 [2021-10-05 23:18:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:03,245 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 207 transitions. [2021-10-05 23:18:03,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 207 transitions. [2021-10-05 23:18:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:18:03,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:03,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:03,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 23:18:03,248 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:03,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2010309788, now seen corresponding path program 1 times [2021-10-05 23:18:03,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:03,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328159789] [2021-10-05 23:18:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:03,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:03,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:03,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328159789] [2021-10-05 23:18:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328159789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:18:03,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:18:03,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 23:18:03,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585230517] [2021-10-05 23:18:03,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 23:18:03,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 23:18:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:18:03,357 INFO L87 Difference]: Start difference. First operand 76 states and 207 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:03,382 INFO L93 Difference]: Finished difference Result 128 states and 335 transitions. [2021-10-05 23:18:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:18:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:18:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:03,385 INFO L225 Difference]: With dead ends: 128 [2021-10-05 23:18:03,385 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 23:18:03,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:18:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 23:18:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-10-05 23:18:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.671232876712329) internal successors, (195), 73 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 195 transitions. [2021-10-05 23:18:03,411 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 195 transitions. Word has length 21 [2021-10-05 23:18:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:03,412 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 195 transitions. [2021-10-05 23:18:03,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 195 transitions. [2021-10-05 23:18:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:18:03,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:03,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:03,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 23:18:03,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash -859826869, now seen corresponding path program 1 times [2021-10-05 23:18:03,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:03,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371124262] [2021-10-05 23:18:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:03,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:03,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:03,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371124262] [2021-10-05 23:18:03,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371124262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:03,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137122605] [2021-10-05 23:18:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:03,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:03,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 23:18:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 23:18:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137122605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:04,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:04,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-10-05 23:18:04,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061398580] [2021-10-05 23:18:04,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 23:18:04,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 23:18:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:18:04,081 INFO L87 Difference]: Start difference. First operand 74 states and 195 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:04,107 INFO L93 Difference]: Finished difference Result 103 states and 272 transitions. [2021-10-05 23:18:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:18:04,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:18:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:04,110 INFO L225 Difference]: With dead ends: 103 [2021-10-05 23:18:04,110 INFO L226 Difference]: Without dead ends: 92 [2021-10-05 23:18:04,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:18:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-05 23:18:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-05 23:18:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.6923076923076925) internal successors, (245), 91 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 245 transitions. [2021-10-05 23:18:04,123 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 245 transitions. Word has length 21 [2021-10-05 23:18:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:04,123 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 245 transitions. [2021-10-05 23:18:04,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 245 transitions. [2021-10-05 23:18:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 23:18:04,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:04,130 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:04,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:04,345 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash 582858247, now seen corresponding path program 2 times [2021-10-05 23:18:04,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:04,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126478286] [2021-10-05 23:18:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:04,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:04,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:04,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126478286] [2021-10-05 23:18:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126478286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:04,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664792637] [2021-10-05 23:18:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:18:04,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:04,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 23:18:04,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:18:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 23:18:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664792637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:05,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:05,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-05 23:18:05,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083250093] [2021-10-05 23:18:05,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 23:18:05,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:05,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 23:18:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-05 23:18:05,012 INFO L87 Difference]: Start difference. First operand 92 states and 245 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:05,271 INFO L93 Difference]: Finished difference Result 350 states and 808 transitions. [2021-10-05 23:18:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 23:18:05,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-05 23:18:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:05,274 INFO L225 Difference]: With dead ends: 350 [2021-10-05 23:18:05,274 INFO L226 Difference]: Without dead ends: 240 [2021-10-05 23:18:05,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-05 23:18:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-05 23:18:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 158. [2021-10-05 23:18:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5859872611464967) internal successors, (406), 157 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 406 transitions. [2021-10-05 23:18:05,283 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 406 transitions. Word has length 22 [2021-10-05 23:18:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:05,284 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 406 transitions. [2021-10-05 23:18:05,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 406 transitions. [2021-10-05 23:18:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 23:18:05,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:05,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:05,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-05 23:18:05,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-05 23:18:05,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash 272184246, now seen corresponding path program 1 times [2021-10-05 23:18:05,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:05,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974704546] [2021-10-05 23:18:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:05,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:06,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:06,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974704546] [2021-10-05 23:18:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974704546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:06,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838200547] [2021-10-05 23:18:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:06,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:06,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:06,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 23:18:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 23:18:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-05 23:18:06,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 23:18:06,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:18:06,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:18:06,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:18:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:06,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838200547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:06,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:06,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-05 23:18:06,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282731038] [2021-10-05 23:18:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:18:06,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:18:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:18:06,834 INFO L87 Difference]: Start difference. First operand 158 states and 406 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:07,182 INFO L93 Difference]: Finished difference Result 211 states and 557 transitions. [2021-10-05 23:18:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 23:18:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-05 23:18:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:07,184 INFO L225 Difference]: With dead ends: 211 [2021-10-05 23:18:07,185 INFO L226 Difference]: Without dead ends: 198 [2021-10-05 23:18:07,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-10-05 23:18:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-05 23:18:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-10-05 23:18:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.67027027027027) internal successors, (494), 185 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 494 transitions. [2021-10-05 23:18:07,194 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 494 transitions. Word has length 22 [2021-10-05 23:18:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:07,194 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 494 transitions. [2021-10-05 23:18:07,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 494 transitions. [2021-10-05 23:18:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 23:18:07,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:07,196 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:07,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:07,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:07,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash -388316402, now seen corresponding path program 2 times [2021-10-05 23:18:07,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:07,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903297956] [2021-10-05 23:18:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:07,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:08,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:08,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903297956] [2021-10-05 23:18:08,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903297956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:08,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72612696] [2021-10-05 23:18:08,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:18:08,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:08,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:08,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 23:18:08,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:18:08,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-05 23:18:08,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:18:08,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72612696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:08,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:08,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-10-05 23:18:08,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366659432] [2021-10-05 23:18:08,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 23:18:08,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 23:18:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-05 23:18:08,779 INFO L87 Difference]: Start difference. First operand 186 states and 494 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:09,081 INFO L93 Difference]: Finished difference Result 302 states and 777 transitions. [2021-10-05 23:18:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 23:18:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 23:18:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:09,085 INFO L225 Difference]: With dead ends: 302 [2021-10-05 23:18:09,085 INFO L226 Difference]: Without dead ends: 289 [2021-10-05 23:18:09,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-05 23:18:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-05 23:18:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 192. [2021-10-05 23:18:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.769633507853403) internal successors, (529), 191 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 529 transitions. [2021-10-05 23:18:09,094 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 529 transitions. Word has length 23 [2021-10-05 23:18:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:09,094 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 529 transitions. [2021-10-05 23:18:09,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 529 transitions. [2021-10-05 23:18:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 23:18:09,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:09,095 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:09,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:09,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:09,309 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 602101569, now seen corresponding path program 3 times [2021-10-05 23:18:09,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:09,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155538537] [2021-10-05 23:18:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:09,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:09,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:09,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155538537] [2021-10-05 23:18:09,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155538537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:09,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588008589] [2021-10-05 23:18:09,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:18:09,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:09,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:09,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 23:18:09,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 23:18:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-05 23:18:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:09,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588008589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:09,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:09,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-05 23:18:09,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196195249] [2021-10-05 23:18:09,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 23:18:09,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 23:18:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-05 23:18:09,835 INFO L87 Difference]: Start difference. First operand 192 states and 529 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:09,928 INFO L93 Difference]: Finished difference Result 440 states and 1144 transitions. [2021-10-05 23:18:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 23:18:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 23:18:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:09,932 INFO L225 Difference]: With dead ends: 440 [2021-10-05 23:18:09,932 INFO L226 Difference]: Without dead ends: 428 [2021-10-05 23:18:09,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-05 23:18:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-10-05 23:18:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 274. [2021-10-05 23:18:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.717948717948718) internal successors, (742), 273 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 742 transitions. [2021-10-05 23:18:09,956 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 742 transitions. Word has length 23 [2021-10-05 23:18:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:09,957 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 742 transitions. [2021-10-05 23:18:09,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 742 transitions. [2021-10-05 23:18:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 23:18:09,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:09,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:09,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:10,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:10,174 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1429884047, now seen corresponding path program 1 times [2021-10-05 23:18:10,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:10,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967496600] [2021-10-05 23:18:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:10,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:10,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967496600] [2021-10-05 23:18:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967496600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:10,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946180066] [2021-10-05 23:18:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:10,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:10,375 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:10,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 23:18:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:10,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-05 23:18:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:10,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946180066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:18:10,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-05 23:18:10,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-10-05 23:18:10,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737359315] [2021-10-05 23:18:10,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 23:18:10,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 23:18:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-05 23:18:10,826 INFO L87 Difference]: Start difference. First operand 274 states and 742 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:10,902 INFO L93 Difference]: Finished difference Result 292 states and 734 transitions. [2021-10-05 23:18:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:18:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 23:18:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:10,905 INFO L225 Difference]: With dead ends: 292 [2021-10-05 23:18:10,905 INFO L226 Difference]: Without dead ends: 254 [2021-10-05 23:18:10,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-05 23:18:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-05 23:18:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 232. [2021-10-05 23:18:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.670995670995671) internal successors, (617), 231 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 617 transitions. [2021-10-05 23:18:10,916 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 617 transitions. Word has length 23 [2021-10-05 23:18:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:10,916 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 617 transitions. [2021-10-05 23:18:10,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 617 transitions. [2021-10-05 23:18:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 23:18:10,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:10,918 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:10,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-05 23:18:11,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-05 23:18:11,128 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2097684022, now seen corresponding path program 1 times [2021-10-05 23:18:11,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:11,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149243254] [2021-10-05 23:18:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:11,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:18:11,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:11,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149243254] [2021-10-05 23:18:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149243254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:11,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811811019] [2021-10-05 23:18:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:11,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:11,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:11,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 23:18:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-05 23:18:11,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:18:11,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811811019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:11,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:11,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-05 23:18:11,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482013525] [2021-10-05 23:18:11,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-05 23:18:11,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-05 23:18:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-05 23:18:11,652 INFO L87 Difference]: Start difference. First operand 232 states and 617 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:11,708 INFO L93 Difference]: Finished difference Result 216 states and 531 transitions. [2021-10-05 23:18:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:18:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 23:18:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:11,710 INFO L225 Difference]: With dead ends: 216 [2021-10-05 23:18:11,710 INFO L226 Difference]: Without dead ends: 190 [2021-10-05 23:18:11,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-05 23:18:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-05 23:18:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 157. [2021-10-05 23:18:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5705128205128207) internal successors, (401), 156 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 401 transitions. [2021-10-05 23:18:11,717 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 401 transitions. Word has length 24 [2021-10-05 23:18:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:11,717 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 401 transitions. [2021-10-05 23:18:11,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 401 transitions. [2021-10-05 23:18:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 23:18:11,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:11,719 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:11,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:11,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:11,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1610080812, now seen corresponding path program 1 times [2021-10-05 23:18:11,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:11,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561185663] [2021-10-05 23:18:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:11,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:12,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:12,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561185663] [2021-10-05 23:18:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561185663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:12,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678259167] [2021-10-05 23:18:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:12,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:12,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:12,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 23:18:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 23:18:12,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:18:13,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678259167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:13,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:13,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2021-10-05 23:18:13,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686592129] [2021-10-05 23:18:13,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 23:18:13,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 23:18:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-05 23:18:13,011 INFO L87 Difference]: Start difference. First operand 157 states and 401 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:13,214 INFO L93 Difference]: Finished difference Result 235 states and 605 transitions. [2021-10-05 23:18:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 23:18:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 23:18:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:13,218 INFO L225 Difference]: With dead ends: 235 [2021-10-05 23:18:13,219 INFO L226 Difference]: Without dead ends: 222 [2021-10-05 23:18:13,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-05 23:18:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-05 23:18:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 187. [2021-10-05 23:18:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.7419354838709675) internal successors, (510), 186 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 510 transitions. [2021-10-05 23:18:13,226 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 510 transitions. Word has length 24 [2021-10-05 23:18:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:13,227 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 510 transitions. [2021-10-05 23:18:13,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 510 transitions. [2021-10-05 23:18:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 23:18:13,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:13,230 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:13,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-05 23:18:13,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-05 23:18:13,444 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1607853721, now seen corresponding path program 1 times [2021-10-05 23:18:13,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:13,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587873226] [2021-10-05 23:18:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:13,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:13,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:13,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587873226] [2021-10-05 23:18:13,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587873226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:13,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468480975] [2021-10-05 23:18:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:13,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:13,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:13,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 23:18:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-05 23:18:13,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:18:14,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468480975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:14,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:14,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-10-05 23:18:14,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129364342] [2021-10-05 23:18:14,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 23:18:14,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 23:18:14,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-05 23:18:14,275 INFO L87 Difference]: Start difference. First operand 187 states and 510 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:14,519 INFO L93 Difference]: Finished difference Result 296 states and 720 transitions. [2021-10-05 23:18:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 23:18:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 23:18:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:14,523 INFO L225 Difference]: With dead ends: 296 [2021-10-05 23:18:14,523 INFO L226 Difference]: Without dead ends: 232 [2021-10-05 23:18:14,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-05 23:18:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-05 23:18:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 130. [2021-10-05 23:18:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.682170542635659) internal successors, (346), 129 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 346 transitions. [2021-10-05 23:18:14,530 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 346 transitions. Word has length 24 [2021-10-05 23:18:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:14,530 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 346 transitions. [2021-10-05 23:18:14,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 346 transitions. [2021-10-05 23:18:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 23:18:14,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:14,532 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:14,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:14,747 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1913540381, now seen corresponding path program 2 times [2021-10-05 23:18:14,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:14,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764031677] [2021-10-05 23:18:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:14,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:18:15,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:15,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764031677] [2021-10-05 23:18:15,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764031677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:15,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477968267] [2021-10-05 23:18:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:18:15,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:15,022 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:15,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 23:18:15,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:18:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-05 23:18:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:15,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477968267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:15,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:15,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-05 23:18:15,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132342810] [2021-10-05 23:18:15,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 23:18:15,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:15,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 23:18:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-05 23:18:15,774 INFO L87 Difference]: Start difference. First operand 130 states and 346 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:16,053 INFO L93 Difference]: Finished difference Result 159 states and 394 transitions. [2021-10-05 23:18:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 23:18:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 23:18:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:16,055 INFO L225 Difference]: With dead ends: 159 [2021-10-05 23:18:16,055 INFO L226 Difference]: Without dead ends: 131 [2021-10-05 23:18:16,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-05 23:18:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-05 23:18:16,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2021-10-05 23:18:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.5398230088495577) internal successors, (287), 113 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2021-10-05 23:18:16,061 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 25 [2021-10-05 23:18:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:16,061 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2021-10-05 23:18:16,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2021-10-05 23:18:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 23:18:16,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:16,063 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:16,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 23:18:16,264 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1813794031, now seen corresponding path program 1 times [2021-10-05 23:18:16,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:16,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695864769] [2021-10-05 23:18:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:16,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:16,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:16,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695864769] [2021-10-05 23:18:16,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695864769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:16,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103204547] [2021-10-05 23:18:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:16,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:16,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:16,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:16,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 23:18:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-05 23:18:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:17,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-05 23:18:17,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 23:18:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 23:18:17,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 23:18:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:17,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103204547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:17,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:17,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2021-10-05 23:18:17,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227635283] [2021-10-05 23:18:17,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 23:18:17,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 23:18:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-05 23:18:17,937 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:18,745 INFO L93 Difference]: Finished difference Result 251 states and 655 transitions. [2021-10-05 23:18:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 23:18:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 23:18:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:18,749 INFO L225 Difference]: With dead ends: 251 [2021-10-05 23:18:18,749 INFO L226 Difference]: Without dead ends: 238 [2021-10-05 23:18:18,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-10-05 23:18:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-05 23:18:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2021-10-05 23:18:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.748633879781421) internal successors, (503), 183 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 503 transitions. [2021-10-05 23:18:18,758 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 503 transitions. Word has length 25 [2021-10-05 23:18:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:18,759 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 503 transitions. [2021-10-05 23:18:18,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 503 transitions. [2021-10-05 23:18:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 23:18:18,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:18,761 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:18,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:18,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:18,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1712250652, now seen corresponding path program 2 times [2021-10-05 23:18:18,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:18,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654572014] [2021-10-05 23:18:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:18,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:20,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:20,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654572014] [2021-10-05 23:18:20,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654572014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:20,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908874998] [2021-10-05 23:18:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:18:20,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:20,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:20,150 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:20,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 23:18:20,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:18:20,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 23:18:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:21,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908874998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:21,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:21,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-05 23:18:21,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951832148] [2021-10-05 23:18:21,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:18:21,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:18:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:18:21,034 INFO L87 Difference]: Start difference. First operand 184 states and 503 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:21,992 INFO L93 Difference]: Finished difference Result 366 states and 996 transitions. [2021-10-05 23:18:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 23:18:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 23:18:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:21,995 INFO L225 Difference]: With dead ends: 366 [2021-10-05 23:18:21,996 INFO L226 Difference]: Without dead ends: 353 [2021-10-05 23:18:21,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-10-05 23:18:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-05 23:18:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 169. [2021-10-05 23:18:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.892857142857143) internal successors, (486), 168 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 486 transitions. [2021-10-05 23:18:22,004 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 486 transitions. Word has length 26 [2021-10-05 23:18:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:22,004 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 486 transitions. [2021-10-05 23:18:22,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 486 transitions. [2021-10-05 23:18:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 23:18:22,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:22,006 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:22,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:22,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-05 23:18:22,221 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash 311412292, now seen corresponding path program 3 times [2021-10-05 23:18:22,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:22,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176854654] [2021-10-05 23:18:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:22,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:18:22,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:22,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176854654] [2021-10-05 23:18:22,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176854654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:22,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166366346] [2021-10-05 23:18:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:18:22,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:22,337 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:22,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 23:18:22,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 23:18:22,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 23:18:22,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166366346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:23,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:23,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-05 23:18:23,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600872741] [2021-10-05 23:18:23,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 23:18:23,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 23:18:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 23:18:23,147 INFO L87 Difference]: Start difference. First operand 169 states and 486 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:23,335 INFO L93 Difference]: Finished difference Result 402 states and 1113 transitions. [2021-10-05 23:18:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 23:18:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 23:18:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:23,341 INFO L225 Difference]: With dead ends: 402 [2021-10-05 23:18:23,341 INFO L226 Difference]: Without dead ends: 386 [2021-10-05 23:18:23,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 23:18:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-10-05 23:18:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 280. [2021-10-05 23:18:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-10-05 23:18:23,357 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 26 [2021-10-05 23:18:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:23,357 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-10-05 23:18:23,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-10-05 23:18:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 23:18:23,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:23,358 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:23,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:23,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-05 23:18:23,572 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 361284422, now seen corresponding path program 4 times [2021-10-05 23:18:23,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:23,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336138290] [2021-10-05 23:18:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:23,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:23,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:23,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336138290] [2021-10-05 23:18:23,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336138290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:23,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194137621] [2021-10-05 23:18:23,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:18:23,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:23,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:23,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-05 23:18:24,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:18:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 23:18:24,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:18:25,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194137621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:25,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:25,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-05 23:18:25,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919883467] [2021-10-05 23:18:25,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 23:18:25,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 23:18:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-05 23:18:25,223 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:25,674 INFO L93 Difference]: Finished difference Result 366 states and 984 transitions. [2021-10-05 23:18:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 23:18:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 23:18:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:25,677 INFO L225 Difference]: With dead ends: 366 [2021-10-05 23:18:25,677 INFO L226 Difference]: Without dead ends: 329 [2021-10-05 23:18:25,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 490.2ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:18:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-10-05 23:18:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 263. [2021-10-05 23:18:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.885496183206107) internal successors, (756), 262 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 756 transitions. [2021-10-05 23:18:25,688 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 756 transitions. Word has length 26 [2021-10-05 23:18:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:25,689 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 756 transitions. [2021-10-05 23:18:25,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 756 transitions. [2021-10-05 23:18:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-05 23:18:25,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:25,691 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:25,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:25,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:25,907 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1767249508, now seen corresponding path program 5 times [2021-10-05 23:18:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:25,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637300088] [2021-10-05 23:18:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:25,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:18:26,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637300088] [2021-10-05 23:18:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637300088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234593039] [2021-10-05 23:18:26,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:18:26,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:26,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:26,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-05 23:18:26,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 23:18:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-05 23:18:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:27,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 23:18:27,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 23:18:27,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 23:18:27,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 23:18:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:27,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234593039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:27,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:27,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 20 [2021-10-05 23:18:27,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237238184] [2021-10-05 23:18:27,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-05 23:18:27,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-05 23:18:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-10-05 23:18:27,946 INFO L87 Difference]: Start difference. First operand 263 states and 756 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:29,568 INFO L93 Difference]: Finished difference Result 504 states and 1425 transitions. [2021-10-05 23:18:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-05 23:18:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-05 23:18:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:29,574 INFO L225 Difference]: With dead ends: 504 [2021-10-05 23:18:29,575 INFO L226 Difference]: Without dead ends: 491 [2021-10-05 23:18:29,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1543.9ms TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-10-05 23:18:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-05 23:18:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 334. [2021-10-05 23:18:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.945945945945946) internal successors, (981), 333 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 981 transitions. [2021-10-05 23:18:29,590 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 981 transitions. Word has length 27 [2021-10-05 23:18:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:29,591 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 981 transitions. [2021-10-05 23:18:29,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 981 transitions. [2021-10-05 23:18:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-05 23:18:29,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:29,593 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:29,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:29,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:29,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1136066660, now seen corresponding path program 1 times [2021-10-05 23:18:29,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:29,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122687005] [2021-10-05 23:18:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:29,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 23:18:30,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:30,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122687005] [2021-10-05 23:18:30,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122687005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:30,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391132699] [2021-10-05 23:18:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:30,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:30,007 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:30,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-05 23:18:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:30,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 23:18:30,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 23:18:33,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391132699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:33,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:33,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-05 23:18:33,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109183513] [2021-10-05 23:18:33,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 23:18:33,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 23:18:33,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-10-05 23:18:33,018 INFO L87 Difference]: Start difference. First operand 334 states and 981 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:33,178 INFO L93 Difference]: Finished difference Result 338 states and 837 transitions. [2021-10-05 23:18:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 23:18:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-05 23:18:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:33,181 INFO L225 Difference]: With dead ends: 338 [2021-10-05 23:18:33,181 INFO L226 Difference]: Without dead ends: 255 [2021-10-05 23:18:33,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2224.5ms TimeCoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2021-10-05 23:18:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-05 23:18:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 173. [2021-10-05 23:18:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.505813953488372) internal successors, (431), 172 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 431 transitions. [2021-10-05 23:18:33,190 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 431 transitions. Word has length 27 [2021-10-05 23:18:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:33,191 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 431 transitions. [2021-10-05 23:18:33,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 431 transitions. [2021-10-05 23:18:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 23:18:33,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:33,192 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:33,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:33,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-05 23:18:33,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash -849716615, now seen corresponding path program 6 times [2021-10-05 23:18:33,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:33,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587015562] [2021-10-05 23:18:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:33,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:34,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:34,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587015562] [2021-10-05 23:18:34,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587015562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:34,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577170075] [2021-10-05 23:18:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:18:34,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:34,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:34,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-05 23:18:35,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 23:18:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:35,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 23:18:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:18:35,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577170075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:35,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:35,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-05 23:18:35,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292780421] [2021-10-05 23:18:35,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 23:18:35,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 23:18:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:18:35,747 INFO L87 Difference]: Start difference. First operand 173 states and 431 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:37,148 INFO L93 Difference]: Finished difference Result 314 states and 719 transitions. [2021-10-05 23:18:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 23:18:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 23:18:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:37,150 INFO L225 Difference]: With dead ends: 314 [2021-10-05 23:18:37,151 INFO L226 Difference]: Without dead ends: 301 [2021-10-05 23:18:37,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1450.8ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 23:18:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-05 23:18:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 133. [2021-10-05 23:18:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.628787878787879) internal successors, (347), 132 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 347 transitions. [2021-10-05 23:18:37,157 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 347 transitions. Word has length 28 [2021-10-05 23:18:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 347 transitions. [2021-10-05 23:18:37,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 347 transitions. [2021-10-05 23:18:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 23:18:37,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:37,159 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:37,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:37,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:37,373 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1754292505, now seen corresponding path program 7 times [2021-10-05 23:18:37,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:37,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385917737] [2021-10-05 23:18:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:37,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:18:37,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:37,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385917737] [2021-10-05 23:18:37,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385917737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:37,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186764727] [2021-10-05 23:18:37,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:18:37,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:37,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:37,600 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:37,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-05 23:18:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-05 23:18:38,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:18:38,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186764727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:38,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:38,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-10-05 23:18:38,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723475409] [2021-10-05 23:18:38,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:18:38,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:18:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:18:38,507 INFO L87 Difference]: Start difference. First operand 133 states and 347 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:38,965 INFO L93 Difference]: Finished difference Result 517 states and 1399 transitions. [2021-10-05 23:18:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-05 23:18:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 23:18:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:38,970 INFO L225 Difference]: With dead ends: 517 [2021-10-05 23:18:38,970 INFO L226 Difference]: Without dead ends: 493 [2021-10-05 23:18:38,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-05 23:18:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-10-05 23:18:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 257. [2021-10-05 23:18:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.0234375) internal successors, (774), 256 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 774 transitions. [2021-10-05 23:18:38,984 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 774 transitions. Word has length 28 [2021-10-05 23:18:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:38,984 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 774 transitions. [2021-10-05 23:18:38,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 774 transitions. [2021-10-05 23:18:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 23:18:38,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:38,986 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:39,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-05 23:18:39,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:39,201 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1804164635, now seen corresponding path program 8 times [2021-10-05 23:18:39,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:39,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800342908] [2021-10-05 23:18:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:39,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:39,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800342908] [2021-10-05 23:18:39,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800342908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186736716] [2021-10-05 23:18:39,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:18:39,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:39,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:39,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:39,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-05 23:18:40,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:18:40,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:40,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-05 23:18:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:40,600 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-05 23:18:40,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 108 [2021-10-05 23:18:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 23:18:42,435 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-05 23:18:42,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-05 23:18:44,954 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-05 23:18:44,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-05 23:18:45,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-10-05 23:18:45,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:18:45,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:18:45,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:18:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:46,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186736716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:46,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:46,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 25 [2021-10-05 23:18:46,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343148633] [2021-10-05 23:18:46,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-05 23:18:46,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-05 23:18:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-05 23:18:46,576 INFO L87 Difference]: Start difference. First operand 257 states and 774 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:48,239 INFO L93 Difference]: Finished difference Result 480 states and 1330 transitions. [2021-10-05 23:18:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 23:18:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 23:18:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:48,244 INFO L225 Difference]: With dead ends: 480 [2021-10-05 23:18:48,244 INFO L226 Difference]: Without dead ends: 459 [2021-10-05 23:18:48,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2116.8ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 23:18:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-10-05 23:18:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 421. [2021-10-05 23:18:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.8261904761904764) internal successors, (1187), 420 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1187 transitions. [2021-10-05 23:18:48,260 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1187 transitions. Word has length 28 [2021-10-05 23:18:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:48,261 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1187 transitions. [2021-10-05 23:18:48,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1187 transitions. [2021-10-05 23:18:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 23:18:48,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:48,263 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:48,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-05 23:18:48,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1369967475, now seen corresponding path program 9 times [2021-10-05 23:18:48,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:48,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978083611] [2021-10-05 23:18:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:48,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:18:49,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:49,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978083611] [2021-10-05 23:18:49,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978083611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:49,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864570324] [2021-10-05 23:18:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:18:49,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:49,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:49,444 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:49,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-05 23:18:50,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 23:18:50,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:50,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 23:18:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:51,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864570324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:51,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:51,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-05 23:18:51,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787906763] [2021-10-05 23:18:51,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-05 23:18:51,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-05 23:18:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-10-05 23:18:51,345 INFO L87 Difference]: Start difference. First operand 421 states and 1187 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:52,916 INFO L93 Difference]: Finished difference Result 608 states and 1671 transitions. [2021-10-05 23:18:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-05 23:18:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 23:18:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:52,921 INFO L225 Difference]: With dead ends: 608 [2021-10-05 23:18:52,922 INFO L226 Difference]: Without dead ends: 587 [2021-10-05 23:18:52,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1763.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-10-05 23:18:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-05 23:18:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 379. [2021-10-05 23:18:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9497354497354498) internal successors, (1115), 378 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1115 transitions. [2021-10-05 23:18:52,939 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1115 transitions. Word has length 29 [2021-10-05 23:18:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:52,940 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1115 transitions. [2021-10-05 23:18:52,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1115 transitions. [2021-10-05 23:18:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 23:18:52,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:52,942 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:52,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:53,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-05 23:18:53,156 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash 133041116, now seen corresponding path program 10 times [2021-10-05 23:18:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:53,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258014840] [2021-10-05 23:18:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:53,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:18:53,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:53,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258014840] [2021-10-05 23:18:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258014840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:53,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817474340] [2021-10-05 23:18:53,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:18:53,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:53,369 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:53,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-05 23:18:54,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:18:54,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 23:18:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:18:54,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817474340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:54,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:54,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-05 23:18:54,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451004391] [2021-10-05 23:18:54,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 23:18:54,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 23:18:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 23:18:54,698 INFO L87 Difference]: Start difference. First operand 379 states and 1115 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:54,854 INFO L93 Difference]: Finished difference Result 515 states and 1467 transitions. [2021-10-05 23:18:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 23:18:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 23:18:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:54,859 INFO L225 Difference]: With dead ends: 515 [2021-10-05 23:18:54,859 INFO L226 Difference]: Without dead ends: 467 [2021-10-05 23:18:54,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 23:18:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-10-05 23:18:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 287. [2021-10-05 23:18:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1573426573426575) internal successors, (903), 286 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 903 transitions. [2021-10-05 23:18:54,874 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 903 transitions. Word has length 29 [2021-10-05 23:18:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:54,874 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 903 transitions. [2021-10-05 23:18:54,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 903 transitions. [2021-10-05 23:18:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 23:18:54,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:54,876 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:54,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:55,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-05 23:18:55,092 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 848853372, now seen corresponding path program 11 times [2021-10-05 23:18:55,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:55,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412131414] [2021-10-05 23:18:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:55,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 23:18:55,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:55,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412131414] [2021-10-05 23:18:55,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412131414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:55,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861078422] [2021-10-05 23:18:55,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:18:55,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:55,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:55,301 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:55,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-05 23:18:56,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 23:18:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 23:18:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:18:57,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861078422] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:57,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:57,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-10-05 23:18:57,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792355734] [2021-10-05 23:18:57,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 23:18:57,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 23:18:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-10-05 23:18:57,104 INFO L87 Difference]: Start difference. First operand 287 states and 903 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:18:57,470 INFO L93 Difference]: Finished difference Result 418 states and 1176 transitions. [2021-10-05 23:18:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 23:18:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 23:18:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:18:57,474 INFO L225 Difference]: With dead ends: 418 [2021-10-05 23:18:57,474 INFO L226 Difference]: Without dead ends: 371 [2021-10-05 23:18:57,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-10-05 23:18:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-10-05 23:18:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 333. [2021-10-05 23:18:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0210843373493974) internal successors, (1003), 332 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1003 transitions. [2021-10-05 23:18:57,487 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1003 transitions. Word has length 29 [2021-10-05 23:18:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:18:57,488 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 1003 transitions. [2021-10-05 23:18:57,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:18:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1003 transitions. [2021-10-05 23:18:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-05 23:18:57,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:18:57,490 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:18:57,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-05 23:18:57,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-05 23:18:57,704 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:18:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:18:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 791925143, now seen corresponding path program 12 times [2021-10-05 23:18:57,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:18:57,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144905569] [2021-10-05 23:18:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:18:57,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:18:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:18:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:18:57,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:18:57,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144905569] [2021-10-05 23:18:57,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144905569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:57,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40736719] [2021-10-05 23:18:57,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:18:57,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:18:57,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:18:57,969 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:18:57,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-05 23:18:58,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 23:18:58,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:18:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 23:18:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:18:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:18:59,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40736719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:18:59,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:18:59,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 23:18:59,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607726826] [2021-10-05 23:18:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 23:18:59,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:18:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 23:18:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-05 23:18:59,776 INFO L87 Difference]: Start difference. First operand 333 states and 1003 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:00,072 INFO L93 Difference]: Finished difference Result 407 states and 1146 transitions. [2021-10-05 23:19:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 23:19:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-05 23:19:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:00,076 INFO L225 Difference]: With dead ends: 407 [2021-10-05 23:19:00,093 INFO L226 Difference]: Without dead ends: 365 [2021-10-05 23:19:00,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-05 23:19:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-05 23:19:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 269. [2021-10-05 23:19:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0522388059701493) internal successors, (818), 268 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 818 transitions. [2021-10-05 23:19:00,110 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 818 transitions. Word has length 30 [2021-10-05 23:19:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:00,110 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 818 transitions. [2021-10-05 23:19:00,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 818 transitions. [2021-10-05 23:19:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-05 23:19:00,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:00,112 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:00,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:00,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-05 23:19:00,328 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash 277272999, now seen corresponding path program 1 times [2021-10-05 23:19:00,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:00,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867190317] [2021-10-05 23:19:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:00,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:19:01,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:01,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867190317] [2021-10-05 23:19:01,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867190317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:01,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562343935] [2021-10-05 23:19:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:01,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:01,105 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:01,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-05 23:19:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-05 23:19:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:02,036 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-05 23:19:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 703 treesize of output 725 [2021-10-05 23:19:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 23:19:03,869 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-05 23:19:03,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-05 23:19:04,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2021-10-05 23:19:06,987 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-05 23:19:06,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-05 23:19:07,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-05 23:19:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:19:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:19:07,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:19:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:19:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562343935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:08,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:08,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 28 [2021-10-05 23:19:08,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934579401] [2021-10-05 23:19:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 23:19:08,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 23:19:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-10-05 23:19:08,816 INFO L87 Difference]: Start difference. First operand 269 states and 818 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:11,590 INFO L93 Difference]: Finished difference Result 1034 states and 3163 transitions. [2021-10-05 23:19:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 23:19:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-05 23:19:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:11,596 INFO L225 Difference]: With dead ends: 1034 [2021-10-05 23:19:11,596 INFO L226 Difference]: Without dead ends: 931 [2021-10-05 23:19:11,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2864.1ms TimeCoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2021-10-05 23:19:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-10-05 23:19:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 567. [2021-10-05 23:19:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.3374558303886928) internal successors, (1889), 566 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1889 transitions. [2021-10-05 23:19:11,622 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1889 transitions. Word has length 30 [2021-10-05 23:19:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:11,623 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1889 transitions. [2021-10-05 23:19:11,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1889 transitions. [2021-10-05 23:19:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-05 23:19:11,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:11,626 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:11,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-05 23:19:11,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-05 23:19:11,842 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash -374370049, now seen corresponding path program 2 times [2021-10-05 23:19:11,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:11,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691574507] [2021-10-05 23:19:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:11,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:19:13,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:13,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691574507] [2021-10-05 23:19:13,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691574507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:13,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958538795] [2021-10-05 23:19:13,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:19:13,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:13,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:13,051 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:13,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-05 23:19:13,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:19:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 23:19:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:19:15,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958538795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:15,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:15,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-05 23:19:15,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056378510] [2021-10-05 23:19:15,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-05 23:19:15,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-05 23:19:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-05 23:19:15,328 INFO L87 Difference]: Start difference. First operand 567 states and 1889 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:16,623 INFO L93 Difference]: Finished difference Result 746 states and 2286 transitions. [2021-10-05 23:19:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 23:19:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-05 23:19:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:16,629 INFO L225 Difference]: With dead ends: 746 [2021-10-05 23:19:16,629 INFO L226 Difference]: Without dead ends: 725 [2021-10-05 23:19:16,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1653.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-10-05 23:19:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-10-05 23:19:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 575. [2021-10-05 23:19:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.346689895470383) internal successors, (1921), 574 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1921 transitions. [2021-10-05 23:19:16,648 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1921 transitions. Word has length 31 [2021-10-05 23:19:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:16,649 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1921 transitions. [2021-10-05 23:19:16,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1921 transitions. [2021-10-05 23:19:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-05 23:19:16,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:16,652 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:16,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:16,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:16,868 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash 759852912, now seen corresponding path program 3 times [2021-10-05 23:19:16,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:16,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511879271] [2021-10-05 23:19:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:16,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:19:17,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:17,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511879271] [2021-10-05 23:19:17,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511879271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:17,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244508910] [2021-10-05 23:19:17,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:19:17,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:17,558 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:17,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-05 23:19:18,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 23:19:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 23:19:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:19:20,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244508910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:20,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:20,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-10-05 23:19:20,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231492542] [2021-10-05 23:19:20,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-05 23:19:20,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-05 23:19:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-05 23:19:20,164 INFO L87 Difference]: Start difference. First operand 575 states and 1921 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:21,644 INFO L93 Difference]: Finished difference Result 573 states and 1642 transitions. [2021-10-05 23:19:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-05 23:19:21,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-05 23:19:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:21,648 INFO L225 Difference]: With dead ends: 573 [2021-10-05 23:19:21,648 INFO L226 Difference]: Without dead ends: 403 [2021-10-05 23:19:21,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1702.0ms TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-10-05 23:19:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-05 23:19:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 323. [2021-10-05 23:19:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.3074534161490683) internal successors, (1065), 322 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1065 transitions. [2021-10-05 23:19:21,661 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1065 transitions. Word has length 31 [2021-10-05 23:19:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:21,661 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 1065 transitions. [2021-10-05 23:19:21,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1065 transitions. [2021-10-05 23:19:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-05 23:19:21,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:21,663 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:21,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-05 23:19:21,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:21,878 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -65335875, now seen corresponding path program 4 times [2021-10-05 23:19:21,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:21,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765424065] [2021-10-05 23:19:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:21,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:19:22,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:22,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765424065] [2021-10-05 23:19:22,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765424065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:22,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930976040] [2021-10-05 23:19:22,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:19:22,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:22,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:22,153 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:22,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-05 23:19:23,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:19:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 23:19:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:19:24,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930976040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:24,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:24,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 23:19:24,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078624618] [2021-10-05 23:19:24,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 23:19:24,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 23:19:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-05 23:19:24,130 INFO L87 Difference]: Start difference. First operand 323 states and 1065 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:24,250 INFO L93 Difference]: Finished difference Result 315 states and 986 transitions. [2021-10-05 23:19:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 23:19:24,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-05 23:19:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:24,253 INFO L225 Difference]: With dead ends: 315 [2021-10-05 23:19:24,253 INFO L226 Difference]: Without dead ends: 305 [2021-10-05 23:19:24,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-05 23:19:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-05 23:19:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-10-05 23:19:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.164473684210526) internal successors, (962), 304 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 962 transitions. [2021-10-05 23:19:24,261 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 962 transitions. Word has length 31 [2021-10-05 23:19:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:24,261 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 962 transitions. [2021-10-05 23:19:24,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 962 transitions. [2021-10-05 23:19:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-05 23:19:24,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:24,262 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:24,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:24,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-05 23:19:24,463 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1423441852, now seen corresponding path program 5 times [2021-10-05 23:19:24,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:24,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524468728] [2021-10-05 23:19:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:24,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 23:19:25,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:25,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524468728] [2021-10-05 23:19:25,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524468728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:25,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344424807] [2021-10-05 23:19:25,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:19:25,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:25,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:25,469 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:25,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-05 23:19:26,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 23:19:26,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-05 23:19:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:19:28,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344424807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:28,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:28,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 26 [2021-10-05 23:19:28,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751212755] [2021-10-05 23:19:28,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-05 23:19:28,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-05 23:19:28,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-10-05 23:19:28,931 INFO L87 Difference]: Start difference. First operand 305 states and 962 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:30,373 INFO L93 Difference]: Finished difference Result 802 states and 2423 transitions. [2021-10-05 23:19:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-05 23:19:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-05 23:19:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:30,377 INFO L225 Difference]: With dead ends: 802 [2021-10-05 23:19:30,377 INFO L226 Difference]: Without dead ends: 686 [2021-10-05 23:19:30,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1995.0ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-10-05 23:19:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-10-05 23:19:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 522. [2021-10-05 23:19:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.224568138195777) internal successors, (1680), 521 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1680 transitions. [2021-10-05 23:19:30,397 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1680 transitions. Word has length 32 [2021-10-05 23:19:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:30,397 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1680 transitions. [2021-10-05 23:19:30,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1680 transitions. [2021-10-05 23:19:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-05 23:19:30,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:30,400 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:30,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:30,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-05 23:19:30,617 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1277088847, now seen corresponding path program 6 times [2021-10-05 23:19:30,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:30,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458352873] [2021-10-05 23:19:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:30,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:19:32,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:32,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458352873] [2021-10-05 23:19:32,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458352873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:32,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853334494] [2021-10-05 23:19:32,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:19:32,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:32,181 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:32,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-05 23:19:33,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 23:19:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-05 23:19:33,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 23:19:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853334494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:36,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:36,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-05 23:19:36,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519950277] [2021-10-05 23:19:36,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 23:19:36,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 23:19:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-10-05 23:19:36,003 INFO L87 Difference]: Start difference. First operand 522 states and 1680 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:39,438 INFO L93 Difference]: Finished difference Result 689 states and 2051 transitions. [2021-10-05 23:19:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-05 23:19:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-05 23:19:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:39,442 INFO L225 Difference]: With dead ends: 689 [2021-10-05 23:19:39,442 INFO L226 Difference]: Without dead ends: 674 [2021-10-05 23:19:39,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 3927.1ms TimeCoverageRelationStatistics Valid=372, Invalid=2934, Unknown=0, NotChecked=0, Total=3306 [2021-10-05 23:19:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-10-05 23:19:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 532. [2021-10-05 23:19:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.2203389830508473) internal successors, (1710), 531 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1710 transitions. [2021-10-05 23:19:39,461 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1710 transitions. Word has length 33 [2021-10-05 23:19:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:39,461 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1710 transitions. [2021-10-05 23:19:39,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1710 transitions. [2021-10-05 23:19:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 23:19:39,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:39,464 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:39,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:39,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:39,679 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2012969852, now seen corresponding path program 7 times [2021-10-05 23:19:39,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:39,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149419232] [2021-10-05 23:19:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:39,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:19:41,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:41,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149419232] [2021-10-05 23:19:41,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149419232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:41,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096464464] [2021-10-05 23:19:41,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:19:41,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:41,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:41,364 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:41,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-05 23:19:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:42,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 23:19:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:19:44,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096464464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:44,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:44,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 29 [2021-10-05 23:19:44,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029321702] [2021-10-05 23:19:44,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-05 23:19:44,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-05 23:19:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-10-05 23:19:44,693 INFO L87 Difference]: Start difference. First operand 532 states and 1710 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:47,393 INFO L93 Difference]: Finished difference Result 780 states and 2313 transitions. [2021-10-05 23:19:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-05 23:19:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-05 23:19:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:47,400 INFO L225 Difference]: With dead ends: 780 [2021-10-05 23:19:47,400 INFO L226 Difference]: Without dead ends: 758 [2021-10-05 23:19:47,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 3248.3ms TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2021-10-05 23:19:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-10-05 23:19:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 682. [2021-10-05 23:19:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.0558002936857562) internal successors, (2081), 681 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2081 transitions. [2021-10-05 23:19:47,423 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2081 transitions. Word has length 34 [2021-10-05 23:19:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:47,423 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2081 transitions. [2021-10-05 23:19:47,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2081 transitions. [2021-10-05 23:19:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 23:19:47,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:47,426 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:47,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:47,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-05 23:19:47,641 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2085483939, now seen corresponding path program 8 times [2021-10-05 23:19:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:47,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491254116] [2021-10-05 23:19:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:47,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:19:47,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:47,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491254116] [2021-10-05 23:19:47,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491254116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:47,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213361593] [2021-10-05 23:19:47,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:19:47,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:47,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:47,986 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:48,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-05 23:19:49,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:19:49,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:49,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 23:19:49,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 23:19:51,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213361593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:51,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:51,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-05 23:19:51,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668782098] [2021-10-05 23:19:51,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-05 23:19:51,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-05 23:19:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-05 23:19:51,514 INFO L87 Difference]: Start difference. First operand 682 states and 2081 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:51,940 INFO L93 Difference]: Finished difference Result 764 states and 2250 transitions. [2021-10-05 23:19:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 23:19:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-05 23:19:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:51,947 INFO L225 Difference]: With dead ends: 764 [2021-10-05 23:19:51,947 INFO L226 Difference]: Without dead ends: 756 [2021-10-05 23:19:51,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-10-05 23:19:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-10-05 23:19:51,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-10-05 23:19:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.013024602026049) internal successors, (2082), 691 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2082 transitions. [2021-10-05 23:19:51,968 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2082 transitions. Word has length 34 [2021-10-05 23:19:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:51,968 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2082 transitions. [2021-10-05 23:19:51,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2082 transitions. [2021-10-05 23:19:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 23:19:51,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:51,972 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:52,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-05 23:19:52,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:52,186 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:52,186 INFO L82 PathProgramCache]: Analyzing trace with hash 15789447, now seen corresponding path program 9 times [2021-10-05 23:19:52,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:52,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695181505] [2021-10-05 23:19:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:52,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 23:19:52,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:52,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695181505] [2021-10-05 23:19:52,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695181505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:52,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073049616] [2021-10-05 23:19:52,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:19:52,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:52,366 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:52,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-05 23:19:53,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 23:19:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-05 23:19:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 23:19:55,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073049616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:55,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:55,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-05 23:19:55,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538964621] [2021-10-05 23:19:55,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 23:19:55,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 23:19:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-10-05 23:19:55,064 INFO L87 Difference]: Start difference. First operand 692 states and 2082 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:55,869 INFO L93 Difference]: Finished difference Result 570 states and 1318 transitions. [2021-10-05 23:19:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 23:19:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-05 23:19:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:55,873 INFO L225 Difference]: With dead ends: 570 [2021-10-05 23:19:55,873 INFO L226 Difference]: Without dead ends: 451 [2021-10-05 23:19:55,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 897.0ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-10-05 23:19:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-05 23:19:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 435. [2021-10-05 23:19:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.511520737327189) internal successors, (1090), 434 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1090 transitions. [2021-10-05 23:19:55,885 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1090 transitions. Word has length 34 [2021-10-05 23:19:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:55,885 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1090 transitions. [2021-10-05 23:19:55,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1090 transitions. [2021-10-05 23:19:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 23:19:55,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:55,888 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:55,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-05 23:19:56,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:56,102 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:56,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1321685228, now seen corresponding path program 10 times [2021-10-05 23:19:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:56,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674870945] [2021-10-05 23:19:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:56,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:19:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-05 23:19:56,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:19:56,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674870945] [2021-10-05 23:19:56,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674870945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:56,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851895788] [2021-10-05 23:19:56,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:19:56,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:19:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:19:56,379 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:19:56,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-05 23:19:57,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:19:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:19:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 23:19:57,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:19:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 23:19:58,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851895788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:19:58,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:19:58,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-05 23:19:58,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028452575] [2021-10-05 23:19:58,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 23:19:58,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:19:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 23:19:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-10-05 23:19:58,602 INFO L87 Difference]: Start difference. First operand 435 states and 1090 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:19:59,203 INFO L93 Difference]: Finished difference Result 1299 states and 4159 transitions. [2021-10-05 23:19:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 23:19:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 23:19:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:19:59,212 INFO L225 Difference]: With dead ends: 1299 [2021-10-05 23:19:59,212 INFO L226 Difference]: Without dead ends: 1239 [2021-10-05 23:19:59,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 573.7ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 23:19:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-10-05 23:19:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 516. [2021-10-05 23:19:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.479611650485437) internal successors, (1792), 515 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1792 transitions. [2021-10-05 23:19:59,235 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1792 transitions. Word has length 35 [2021-10-05 23:19:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:19:59,235 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1792 transitions. [2021-10-05 23:19:59,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:19:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1792 transitions. [2021-10-05 23:19:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 23:19:59,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:19:59,238 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:19:59,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-05 23:19:59,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-05 23:19:59,452 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:19:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:19:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1518198733, now seen corresponding path program 11 times [2021-10-05 23:19:59,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:19:59,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325909752] [2021-10-05 23:19:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:19:59,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:19:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:20:00,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:00,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325909752] [2021-10-05 23:20:00,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325909752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:00,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312861380] [2021-10-05 23:20:00,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:20:00,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:00,702 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:00,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-05 23:20:02,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 23:20:02,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:20:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-05 23:20:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:02,394 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-05 23:20:02,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 108 [2021-10-05 23:20:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-05 23:20:04,880 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-05 23:20:04,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-05 23:20:06,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-05 23:20:06,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2021-10-05 23:20:09,304 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-05 23:20:09,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-05 23:20:09,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-05 23:20:09,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:20:10,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:20:10,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 23:20:13,241 INFO L354 Elim1Store]: treesize reduction 255, result has 41.4 percent of original size [2021-10-05 23:20:13,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 194 treesize of output 247 [2021-10-05 23:20:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:20:13,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312861380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:13,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:13,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 41 [2021-10-05 23:20:13,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073785398] [2021-10-05 23:20:13,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-05 23:20:13,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-05 23:20:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-10-05 23:20:13,333 INFO L87 Difference]: Start difference. First operand 516 states and 1792 transitions. Second operand has 43 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:16,968 INFO L93 Difference]: Finished difference Result 1196 states and 4170 transitions. [2021-10-05 23:20:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-05 23:20:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 23:20:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:16,978 INFO L225 Difference]: With dead ends: 1196 [2021-10-05 23:20:16,978 INFO L226 Difference]: Without dead ends: 1178 [2021-10-05 23:20:16,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 4629.1ms TimeCoverageRelationStatistics Valid=288, Invalid=3494, Unknown=0, NotChecked=0, Total=3782 [2021-10-05 23:20:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-10-05 23:20:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 809. [2021-10-05 23:20:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.74009900990099) internal successors, (3022), 808 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 3022 transitions. [2021-10-05 23:20:17,012 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 3022 transitions. Word has length 35 [2021-10-05 23:20:17,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:17,012 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 3022 transitions. [2021-10-05 23:20:17,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 3022 transitions. [2021-10-05 23:20:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 23:20:17,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:17,016 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:17,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-05 23:20:17,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-05 23:20:17,232 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1316279678, now seen corresponding path program 12 times [2021-10-05 23:20:17,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:17,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434221307] [2021-10-05 23:20:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:17,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 23:20:18,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:18,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434221307] [2021-10-05 23:20:18,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434221307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:18,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823249831] [2021-10-05 23:20:18,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:20:18,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:18,189 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:18,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-05 23:20:19,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 23:20:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:20:19,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 23:20:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-05 23:20:21,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823249831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:21,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:21,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-10-05 23:20:21,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909959938] [2021-10-05 23:20:21,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-05 23:20:21,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-05 23:20:21,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-10-05 23:20:21,757 INFO L87 Difference]: Start difference. First operand 809 states and 3022 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:23,637 INFO L93 Difference]: Finished difference Result 968 states and 3333 transitions. [2021-10-05 23:20:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 23:20:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 23:20:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:23,657 INFO L225 Difference]: With dead ends: 968 [2021-10-05 23:20:23,658 INFO L226 Difference]: Without dead ends: 894 [2021-10-05 23:20:23,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2182.8ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-10-05 23:20:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-10-05 23:20:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 758. [2021-10-05 23:20:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.8612945838837516) internal successors, (2923), 757 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2923 transitions. [2021-10-05 23:20:23,682 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2923 transitions. Word has length 35 [2021-10-05 23:20:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:23,683 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2923 transitions. [2021-10-05 23:20:23,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2923 transitions. [2021-10-05 23:20:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 23:20:23,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:23,686 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:23,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-05 23:20:23,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-05 23:20:23,900 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash 499005663, now seen corresponding path program 13 times [2021-10-05 23:20:23,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:23,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954076802] [2021-10-05 23:20:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:23,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:20:26,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:26,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954076802] [2021-10-05 23:20:26,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954076802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:26,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339317341] [2021-10-05 23:20:26,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:20:26,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:26,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:26,531 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:26,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-05 23:20:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:28,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-05 23:20:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:20:30,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339317341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:30,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:30,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2021-10-05 23:20:30,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314109275] [2021-10-05 23:20:30,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-05 23:20:30,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:30,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-05 23:20:30,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-10-05 23:20:30,592 INFO L87 Difference]: Start difference. First operand 758 states and 2923 transitions. Second operand has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:33,928 INFO L93 Difference]: Finished difference Result 945 states and 3287 transitions. [2021-10-05 23:20:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-05 23:20:33,929 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 23:20:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:33,933 INFO L225 Difference]: With dead ends: 945 [2021-10-05 23:20:33,933 INFO L226 Difference]: Without dead ends: 884 [2021-10-05 23:20:33,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 4087.6ms TimeCoverageRelationStatistics Valid=487, Invalid=3419, Unknown=0, NotChecked=0, Total=3906 [2021-10-05 23:20:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-10-05 23:20:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 770. [2021-10-05 23:20:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.811443433029909) internal successors, (2931), 769 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2931 transitions. [2021-10-05 23:20:33,956 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2931 transitions. Word has length 35 [2021-10-05 23:20:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:33,957 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2931 transitions. [2021-10-05 23:20:33,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2931 transitions. [2021-10-05 23:20:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 23:20:33,960 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:33,961 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:34,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-05 23:20:34,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:34,175 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:34,175 INFO L82 PathProgramCache]: Analyzing trace with hash 576602075, now seen corresponding path program 14 times [2021-10-05 23:20:34,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:34,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179007734] [2021-10-05 23:20:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:34,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:20:35,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:35,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179007734] [2021-10-05 23:20:35,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179007734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:35,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551123155] [2021-10-05 23:20:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:20:35,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:35,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:35,765 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:35,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-05 23:20:37,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:20:37,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:20:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-05 23:20:37,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:20:40,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551123155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:40,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:40,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2021-10-05 23:20:40,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75818378] [2021-10-05 23:20:40,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-05 23:20:40,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-05 23:20:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-10-05 23:20:40,321 INFO L87 Difference]: Start difference. First operand 770 states and 2931 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:43,770 INFO L93 Difference]: Finished difference Result 1020 states and 3463 transitions. [2021-10-05 23:20:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-05 23:20:43,771 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 23:20:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:43,776 INFO L225 Difference]: With dead ends: 1020 [2021-10-05 23:20:43,776 INFO L226 Difference]: Without dead ends: 1013 [2021-10-05 23:20:43,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3483.1ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-10-05 23:20:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-10-05 23:20:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 784. [2021-10-05 23:20:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.8212005108556832) internal successors, (2992), 783 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2992 transitions. [2021-10-05 23:20:43,798 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2992 transitions. Word has length 36 [2021-10-05 23:20:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:43,798 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2992 transitions. [2021-10-05 23:20:43,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2992 transitions. [2021-10-05 23:20:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 23:20:43,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:43,802 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:43,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-05 23:20:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:44,007 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1131317573, now seen corresponding path program 15 times [2021-10-05 23:20:44,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:44,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297936536] [2021-10-05 23:20:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:44,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 23:20:44,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:44,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297936536] [2021-10-05 23:20:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297936536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:44,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633126642] [2021-10-05 23:20:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:20:44,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:44,354 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:44,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-05 23:20:46,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 23:20:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:20:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-05 23:20:46,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 23:20:46,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633126642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:46,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:46,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-05 23:20:46,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340144419] [2021-10-05 23:20:46,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 23:20:46,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 23:20:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-05 23:20:46,937 INFO L87 Difference]: Start difference. First operand 784 states and 2992 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:47,200 INFO L93 Difference]: Finished difference Result 816 states and 2774 transitions. [2021-10-05 23:20:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 23:20:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 23:20:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:47,204 INFO L225 Difference]: With dead ends: 816 [2021-10-05 23:20:47,204 INFO L226 Difference]: Without dead ends: 810 [2021-10-05 23:20:47,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:20:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-10-05 23:20:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 625. [2021-10-05 23:20:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.5705128205128207) internal successors, (2228), 624 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2228 transitions. [2021-10-05 23:20:47,220 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2228 transitions. Word has length 36 [2021-10-05 23:20:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:47,220 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 2228 transitions. [2021-10-05 23:20:47,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2228 transitions. [2021-10-05 23:20:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 23:20:47,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:47,223 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:47,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-05 23:20:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:47,439 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 934804068, now seen corresponding path program 16 times [2021-10-05 23:20:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:47,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322080486] [2021-10-05 23:20:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:47,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-05 23:20:47,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:47,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322080486] [2021-10-05 23:20:47,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322080486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:47,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738473062] [2021-10-05 23:20:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:20:47,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:47,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:47,665 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:47,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-05 23:20:49,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:20:49,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:20:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-05 23:20:49,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-05 23:20:50,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738473062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:50,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:50,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-10-05 23:20:50,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702417671] [2021-10-05 23:20:50,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 23:20:50,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:50,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 23:20:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:20:50,880 INFO L87 Difference]: Start difference. First operand 625 states and 2228 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:51,267 INFO L93 Difference]: Finished difference Result 543 states and 1498 transitions. [2021-10-05 23:20:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 23:20:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 23:20:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:51,269 INFO L225 Difference]: With dead ends: 543 [2021-10-05 23:20:51,269 INFO L226 Difference]: Without dead ends: 527 [2021-10-05 23:20:51,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-10-05 23:20:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-10-05 23:20:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 375. [2021-10-05 23:20:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.7620320855614975) internal successors, (1033), 374 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1033 transitions. [2021-10-05 23:20:51,278 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1033 transitions. Word has length 36 [2021-10-05 23:20:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:51,278 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1033 transitions. [2021-10-05 23:20:51,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1033 transitions. [2021-10-05 23:20:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 23:20:51,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:51,280 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:51,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-05 23:20:51,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:51,493 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2049072990, now seen corresponding path program 17 times [2021-10-05 23:20:51,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:51,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932033521] [2021-10-05 23:20:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:51,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:20:51,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932033521] [2021-10-05 23:20:51,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932033521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849966993] [2021-10-05 23:20:51,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:20:51,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:51,903 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:51,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-05 23:20:53,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 23:20:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:20:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-05 23:20:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:20:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-05 23:20:54,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849966993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:54,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:20:54,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-10-05 23:20:54,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513813599] [2021-10-05 23:20:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 23:20:54,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:20:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 23:20:54,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:20:54,516 INFO L87 Difference]: Start difference. First operand 375 states and 1033 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:20:55,362 INFO L93 Difference]: Finished difference Result 359 states and 874 transitions. [2021-10-05 23:20:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 23:20:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 23:20:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:20:55,365 INFO L225 Difference]: With dead ends: 359 [2021-10-05 23:20:55,365 INFO L226 Difference]: Without dead ends: 320 [2021-10-05 23:20:55,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 820.1ms TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 23:20:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-05 23:20:55,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 286. [2021-10-05 23:20:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6070175438596492) internal successors, (743), 285 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 743 transitions. [2021-10-05 23:20:55,374 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 743 transitions. Word has length 36 [2021-10-05 23:20:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:20:55,374 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 743 transitions. [2021-10-05 23:20:55,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:20:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 743 transitions. [2021-10-05 23:20:55,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 23:20:55,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:20:55,376 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:20:55,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-05 23:20:55,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:55,591 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:20:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:20:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1199126314, now seen corresponding path program 18 times [2021-10-05 23:20:55,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:20:55,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699386499] [2021-10-05 23:20:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:20:55,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:20:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:20:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:20:58,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:20:58,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699386499] [2021-10-05 23:20:58,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699386499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:20:58,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268780129] [2021-10-05 23:20:58,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:20:58,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:20:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:20:58,690 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:20:58,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-05 23:21:00,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 23:21:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:00,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-05 23:21:00,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:21:03,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268780129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:03,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:03,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 34 [2021-10-05 23:21:03,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962380546] [2021-10-05 23:21:03,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-05 23:21:03,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-05 23:21:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-10-05 23:21:03,593 INFO L87 Difference]: Start difference. First operand 286 states and 743 transitions. Second operand has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:07,519 INFO L93 Difference]: Finished difference Result 782 states and 1976 transitions. [2021-10-05 23:21:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-05 23:21:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 23:21:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:07,522 INFO L225 Difference]: With dead ends: 782 [2021-10-05 23:21:07,522 INFO L226 Difference]: Without dead ends: 692 [2021-10-05 23:21:07,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 5063.5ms TimeCoverageRelationStatistics Valid=330, Invalid=3576, Unknown=0, NotChecked=0, Total=3906 [2021-10-05 23:21:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-10-05 23:21:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 438. [2021-10-05 23:21:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.7437070938215102) internal successors, (1199), 437 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1199 transitions. [2021-10-05 23:21:07,532 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1199 transitions. Word has length 36 [2021-10-05 23:21:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:07,532 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1199 transitions. [2021-10-05 23:21:07,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1199 transitions. [2021-10-05 23:21:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 23:21:07,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:07,534 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:07,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-05 23:21:07,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-05 23:21:07,748 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash -684810706, now seen corresponding path program 19 times [2021-10-05 23:21:07,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:07,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697401576] [2021-10-05 23:21:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:07,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:21:11,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:11,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697401576] [2021-10-05 23:21:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697401576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:11,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081794809] [2021-10-05 23:21:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:21:11,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:11,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:11,344 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:11,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-05 23:21:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 23:21:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-05 23:21:15,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081794809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:15,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:15,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 30 [2021-10-05 23:21:15,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479975913] [2021-10-05 23:21:15,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-05 23:21:15,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-05 23:21:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-10-05 23:21:15,513 INFO L87 Difference]: Start difference. First operand 438 states and 1199 transitions. Second operand has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:19,885 INFO L93 Difference]: Finished difference Result 670 states and 1624 transitions. [2021-10-05 23:21:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-05 23:21:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 23:21:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:19,888 INFO L225 Difference]: With dead ends: 670 [2021-10-05 23:21:19,888 INFO L226 Difference]: Without dead ends: 588 [2021-10-05 23:21:19,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5320.0ms TimeCoverageRelationStatistics Valid=352, Invalid=3308, Unknown=0, NotChecked=0, Total=3660 [2021-10-05 23:21:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-10-05 23:21:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 424. [2021-10-05 23:21:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.7257683215130024) internal successors, (1153), 423 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1153 transitions. [2021-10-05 23:21:19,897 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1153 transitions. Word has length 37 [2021-10-05 23:21:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:19,898 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1153 transitions. [2021-10-05 23:21:19,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1153 transitions. [2021-10-05 23:21:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 23:21:19,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:19,899 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:19,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-05 23:21:20,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-05 23:21:20,100 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1692972943, now seen corresponding path program 20 times [2021-10-05 23:21:20,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:20,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631103983] [2021-10-05 23:21:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:20,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:21:21,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:21,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631103983] [2021-10-05 23:21:21,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631103983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:21,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845505530] [2021-10-05 23:21:21,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:21:21,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:21,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:21,206 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:21,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-05 23:21:23,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:21:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-05 23:21:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:21:26,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845505530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:26,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:26,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2021-10-05 23:21:26,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485078805] [2021-10-05 23:21:26,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-05 23:21:26,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-05 23:21:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 23:21:26,222 INFO L87 Difference]: Start difference. First operand 424 states and 1153 transitions. Second operand has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:27,337 INFO L93 Difference]: Finished difference Result 503 states and 1386 transitions. [2021-10-05 23:21:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 23:21:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 23:21:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:27,340 INFO L225 Difference]: With dead ends: 503 [2021-10-05 23:21:27,340 INFO L226 Difference]: Without dead ends: 490 [2021-10-05 23:21:27,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1877.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2021-10-05 23:21:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-10-05 23:21:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 446. [2021-10-05 23:21:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.7707865168539327) internal successors, (1233), 445 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1233 transitions. [2021-10-05 23:21:27,350 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1233 transitions. Word has length 37 [2021-10-05 23:21:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:27,351 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1233 transitions. [2021-10-05 23:21:27,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1233 transitions. [2021-10-05 23:21:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 23:21:27,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:27,352 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:27,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-05 23:21:27,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:27,553 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash -381882705, now seen corresponding path program 21 times [2021-10-05 23:21:27,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:27,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153997014] [2021-10-05 23:21:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:27,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 23:21:27,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:27,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153997014] [2021-10-05 23:21:27,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153997014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:27,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887877314] [2021-10-05 23:21:27,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:21:27,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:27,989 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:27,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-05 23:21:30,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 23:21:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-05 23:21:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 23:21:32,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887877314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:32,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:32,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-05 23:21:32,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564919956] [2021-10-05 23:21:32,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-05 23:21:32,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-05 23:21:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-10-05 23:21:32,305 INFO L87 Difference]: Start difference. First operand 446 states and 1233 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:33,549 INFO L93 Difference]: Finished difference Result 842 states and 2317 transitions. [2021-10-05 23:21:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 23:21:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 23:21:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:33,552 INFO L225 Difference]: With dead ends: 842 [2021-10-05 23:21:33,552 INFO L226 Difference]: Without dead ends: 776 [2021-10-05 23:21:33,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1307.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 23:21:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-10-05 23:21:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 498. [2021-10-05 23:21:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.8832997987927564) internal successors, (1433), 497 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1433 transitions. [2021-10-05 23:21:33,565 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1433 transitions. Word has length 37 [2021-10-05 23:21:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:33,566 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1433 transitions. [2021-10-05 23:21:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1433 transitions. [2021-10-05 23:21:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 23:21:33,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:33,568 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:33,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-05 23:21:33,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-05 23:21:33,781 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1368167136, now seen corresponding path program 22 times [2021-10-05 23:21:33,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:33,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819130769] [2021-10-05 23:21:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:33,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 23:21:34,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:34,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819130769] [2021-10-05 23:21:34,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819130769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:34,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333639132] [2021-10-05 23:21:34,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:21:34,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:34,102 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:34,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-05 23:21:36,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:21:36,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 23:21:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 23:21:38,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333639132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:38,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:38,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-05 23:21:38,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779207190] [2021-10-05 23:21:38,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 23:21:38,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 23:21:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-05 23:21:38,524 INFO L87 Difference]: Start difference. First operand 498 states and 1433 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:39,286 INFO L93 Difference]: Finished difference Result 1042 states and 2732 transitions. [2021-10-05 23:21:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 23:21:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 23:21:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:39,290 INFO L225 Difference]: With dead ends: 1042 [2021-10-05 23:21:39,290 INFO L226 Difference]: Without dead ends: 854 [2021-10-05 23:21:39,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 849.3ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:21:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-10-05 23:21:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 337. [2021-10-05 23:21:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.267857142857143) internal successors, (1098), 336 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1098 transitions. [2021-10-05 23:21:39,300 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1098 transitions. Word has length 37 [2021-10-05 23:21:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:39,301 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1098 transitions. [2021-10-05 23:21:39,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1098 transitions. [2021-10-05 23:21:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-05 23:21:39,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:39,303 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:39,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-05 23:21:39,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:39,509 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -188229146, now seen corresponding path program 23 times [2021-10-05 23:21:39,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:39,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409137510] [2021-10-05 23:21:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:39,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 23:21:39,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409137510] [2021-10-05 23:21:39,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409137510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:39,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943885470] [2021-10-05 23:21:39,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:21:39,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:39,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:39,919 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:39,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-05 23:21:42,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-05 23:21:42,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 23:21:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:21:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943885470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:45,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:45,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-10-05 23:21:45,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186158635] [2021-10-05 23:21:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 23:21:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 23:21:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-10-05 23:21:45,315 INFO L87 Difference]: Start difference. First operand 337 states and 1098 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:45,845 INFO L93 Difference]: Finished difference Result 343 states and 1099 transitions. [2021-10-05 23:21:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 23:21:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-05 23:21:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:45,847 INFO L225 Difference]: With dead ends: 343 [2021-10-05 23:21:45,847 INFO L226 Difference]: Without dead ends: 309 [2021-10-05 23:21:45,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1210.8ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 23:21:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-10-05 23:21:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-10-05 23:21:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.272727272727273) internal successors, (1008), 308 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 1008 transitions. [2021-10-05 23:21:45,854 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 1008 transitions. Word has length 38 [2021-10-05 23:21:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:45,854 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 1008 transitions. [2021-10-05 23:21:45,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 1008 transitions. [2021-10-05 23:21:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-05 23:21:45,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:45,855 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:45,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-05 23:21:46,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:46,057 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:46,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1386352749, now seen corresponding path program 24 times [2021-10-05 23:21:46,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:46,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216800339] [2021-10-05 23:21:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:46,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 23:21:46,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:46,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216800339] [2021-10-05 23:21:46,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216800339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:46,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747999010] [2021-10-05 23:21:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:21:46,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:46,541 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:46,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-05 23:21:49,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-05 23:21:49,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 23:21:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-05 23:21:51,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747999010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:51,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:51,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-05 23:21:51,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325607276] [2021-10-05 23:21:51,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-05 23:21:51,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-05 23:21:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-10-05 23:21:51,889 INFO L87 Difference]: Start difference. First operand 309 states and 1008 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:53,852 INFO L93 Difference]: Finished difference Result 414 states and 1192 transitions. [2021-10-05 23:21:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-05 23:21:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-05 23:21:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:53,854 INFO L225 Difference]: With dead ends: 414 [2021-10-05 23:21:53,854 INFO L226 Difference]: Without dead ends: 316 [2021-10-05 23:21:53,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2536.9ms TimeCoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2021-10-05 23:21:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-05 23:21:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-10-05 23:21:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.2444444444444445) internal successors, (1022), 315 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1022 transitions. [2021-10-05 23:21:53,860 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1022 transitions. Word has length 39 [2021-10-05 23:21:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:53,861 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1022 transitions. [2021-10-05 23:21:53,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1022 transitions. [2021-10-05 23:21:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-05 23:21:53,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:53,862 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:53,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-05 23:21:54,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-05 23:21:54,063 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:21:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash 12377374, now seen corresponding path program 25 times [2021-10-05 23:21:54,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:54,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295341081] [2021-10-05 23:21:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:54,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:57,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:57,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295341081] [2021-10-05 23:21:57,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295341081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:57,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884489269] [2021-10-05 23:21:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:21:57,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:57,008 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:21:57,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-05 23:21:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:59,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-05 23:21:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:22:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 23:22:04,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884489269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:04,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:22:04,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 49 [2021-10-05 23:22:04,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848977335] [2021-10-05 23:22:04,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-05 23:22:04,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:22:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-05 23:22:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2388, Unknown=0, NotChecked=0, Total=2550 [2021-10-05 23:22:04,663 INFO L87 Difference]: Start difference. First operand 316 states and 1022 transitions. Second operand has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:22:11,449 INFO L93 Difference]: Finished difference Result 596 states and 1569 transitions. [2021-10-05 23:22:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-05 23:22:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-05 23:22:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:22:11,451 INFO L225 Difference]: With dead ends: 596 [2021-10-05 23:22:11,452 INFO L226 Difference]: Without dead ends: 335 [2021-10-05 23:22:11,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 8741.9ms TimeCoverageRelationStatistics Valid=520, Invalid=7312, Unknown=0, NotChecked=0, Total=7832 [2021-10-05 23:22:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-10-05 23:22:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 318. [2021-10-05 23:22:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.230283911671924) internal successors, (1024), 317 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1024 transitions. [2021-10-05 23:22:11,462 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1024 transitions. Word has length 41 [2021-10-05 23:22:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:22:11,463 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1024 transitions. [2021-10-05 23:22:11,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1024 transitions. [2021-10-05 23:22:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-05 23:22:11,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:22:11,464 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:22:11,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-05 23:22:11,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-05 23:22:11,680 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:22:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:22:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1223772933, now seen corresponding path program 26 times [2021-10-05 23:22:11,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:22:11,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431439392] [2021-10-05 23:22:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:22:11,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:22:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:22:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 23:22:13,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:22:13,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431439392] [2021-10-05 23:22:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431439392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:13,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173049229] [2021-10-05 23:22:13,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:22:13,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:22:13,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:22:13,858 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:22:13,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-05 23:22:16,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:22:16,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:22:16,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-05 23:22:16,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:22:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:22:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173049229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:21,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:22:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 46 [2021-10-05 23:22:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161221263] [2021-10-05 23:22:21,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-05 23:22:21,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:22:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-05 23:22:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2074, Unknown=0, NotChecked=0, Total=2256 [2021-10-05 23:22:21,415 INFO L87 Difference]: Start difference. First operand 318 states and 1024 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:22:26,093 INFO L93 Difference]: Finished difference Result 504 states and 1374 transitions. [2021-10-05 23:22:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-05 23:22:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-05 23:22:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:22:26,096 INFO L225 Difference]: With dead ends: 504 [2021-10-05 23:22:26,096 INFO L226 Difference]: Without dead ends: 319 [2021-10-05 23:22:26,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 6277.9ms TimeCoverageRelationStatistics Valid=471, Invalid=5079, Unknown=0, NotChecked=0, Total=5550 [2021-10-05 23:22:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-05 23:22:26,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-10-05 23:22:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.2232704402515724) internal successors, (1025), 318 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 1025 transitions. [2021-10-05 23:22:26,105 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 1025 transitions. Word has length 42 [2021-10-05 23:22:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:22:26,105 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 1025 transitions. [2021-10-05 23:22:26,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 1025 transitions. [2021-10-05 23:22:26,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-05 23:22:26,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:22:26,106 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:22:26,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-05 23:22:26,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-05 23:22:26,309 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:22:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:22:26,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1159255981, now seen corresponding path program 27 times [2021-10-05 23:22:26,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:22:26,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646027547] [2021-10-05 23:22:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:22:26,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:22:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:22:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 23:22:27,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:22:27,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646027547] [2021-10-05 23:22:27,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646027547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:27,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831020724] [2021-10-05 23:22:27,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:22:27,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:22:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:22:27,922 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:22:27,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-05 23:22:31,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-05 23:22:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:22:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-05 23:22:31,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:22:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 23:22:36,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831020724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:36,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:22:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 46 [2021-10-05 23:22:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883043442] [2021-10-05 23:22:36,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-05 23:22:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:22:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-05 23:22:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2094, Unknown=0, NotChecked=0, Total=2256 [2021-10-05 23:22:36,631 INFO L87 Difference]: Start difference. First operand 319 states and 1025 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:22:39,310 INFO L93 Difference]: Finished difference Result 562 states and 1515 transitions. [2021-10-05 23:22:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-05 23:22:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-05 23:22:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:22:39,313 INFO L225 Difference]: With dead ends: 562 [2021-10-05 23:22:39,313 INFO L226 Difference]: Without dead ends: 320 [2021-10-05 23:22:39,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 4724.1ms TimeCoverageRelationStatistics Valid=312, Invalid=3720, Unknown=0, NotChecked=0, Total=4032 [2021-10-05 23:22:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-05 23:22:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-10-05 23:22:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.2163009404388716) internal successors, (1026), 319 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1026 transitions. [2021-10-05 23:22:39,321 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1026 transitions. Word has length 43 [2021-10-05 23:22:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:22:39,322 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1026 transitions. [2021-10-05 23:22:39,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1026 transitions. [2021-10-05 23:22:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-05 23:22:39,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:22:39,324 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:22:39,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-05 23:22:39,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:22:39,537 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 23:22:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:22:39,538 INFO L82 PathProgramCache]: Analyzing trace with hash 840769531, now seen corresponding path program 28 times [2021-10-05 23:22:39,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:22:39,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814131626] [2021-10-05 23:22:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:22:39,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:22:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:22:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 23:22:41,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:22:41,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814131626] [2021-10-05 23:22:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814131626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:41,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968300537] [2021-10-05 23:22:41,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:22:41,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:22:41,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:22:41,687 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 23:22:41,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-05 23:22:44,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:22:44,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:22:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-05 23:22:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:22:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 23:22:49,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968300537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:22:49,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:22:49,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 42 [2021-10-05 23:22:49,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297035402] [2021-10-05 23:22:49,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-05 23:22:49,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:22:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-05 23:22:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2021-10-05 23:22:49,173 INFO L87 Difference]: Start difference. First operand 320 states and 1026 transitions. Second operand has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:22:53,860 INFO L93 Difference]: Finished difference Result 319 states and 587 transitions. [2021-10-05 23:22:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-05 23:22:53,861 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-05 23:22:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:22:53,862 INFO L225 Difference]: With dead ends: 319 [2021-10-05 23:22:53,862 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 23:22:53,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 5887.8ms TimeCoverageRelationStatistics Valid=407, Invalid=5293, Unknown=0, NotChecked=0, Total=5700 [2021-10-05 23:22:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 23:22:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 23:22:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 23:22:53,864 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-10-05 23:22:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:22:53,865 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 23:22:53,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:22:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 23:22:53,865 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 23:22:53,868 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 23:22:53,869 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 23:22:53,869 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 23:22:53,869 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-05 23:22:53,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-05 23:22:54,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-05 23:22:54,084 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 23:22:54,084 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 23:22:54,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 11:22:54 BasicIcfg [2021-10-05 23:22:54,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 23:22:54,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 23:22:54,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 23:22:54,088 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 23:22:54,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:17:50" (3/4) ... [2021-10-05 23:22:54,097 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 23:22:54,103 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 23:22:54,103 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 23:22:54,103 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-05 23:22:54,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-05 23:22:54,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-05 23:22:54,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 23:22:54,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 23:22:54,189 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 23:22:54,190 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 23:22:54,191 INFO L168 Benchmark]: Toolchain (without parser) took 305426.42 ms. Allocated memory was 48.2 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 24.9 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 361.4 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,192 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 39.8 MB. Free memory was 21.3 MB in the beginning and 21.3 MB in the end (delta: 23.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 23:22:54,194 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.50 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 23.9 MB in the end (delta: 653.9 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.75 ms. Allocated memory is still 48.2 MB. Free memory was 23.8 MB in the beginning and 32.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,195 INFO L168 Benchmark]: Boogie Preprocessor took 93.16 ms. Allocated memory is still 48.2 MB. Free memory was 32.5 MB in the beginning and 30.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,195 INFO L168 Benchmark]: RCFGBuilder took 1099.83 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 30.4 MB in the beginning and 38.3 MB in the end (delta: -7.8 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,196 INFO L168 Benchmark]: TraceAbstraction took 303597.07 ms. Allocated memory was 58.7 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 38.0 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 355.2 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,196 INFO L168 Benchmark]: Witness Printer took 102.25 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-05 23:22:54,203 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 39.8 MB. Free memory was 21.3 MB in the beginning and 21.3 MB in the end (delta: 23.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 410.50 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 23.9 MB in the end (delta: 653.9 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.75 ms. Allocated memory is still 48.2 MB. Free memory was 23.8 MB in the beginning and 32.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.16 ms. Allocated memory is still 48.2 MB. Free memory was 32.5 MB in the beginning and 30.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1099.83 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 30.4 MB in the beginning and 38.3 MB in the end (delta: -7.8 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 303597.07 ms. Allocated memory was 58.7 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 38.0 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 355.2 MB. Max. memory is 16.1 GB. * Witness Printer took 102.25 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11167.7ms, 211 PlacesBefore, 33 PlacesAfterwards, 225 TransitionsBefore, 29 TransitionsAfterwards, 2196 CoEnabledTransitionPairs, 7 FixpointIterations, 148 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 5 ConcurrentYvCompositions, 18 ChoiceCompositions, 236 TotalNumberOfCompositions, 2142 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1988, positive: 1960, positive conditional: 0, positive unconditional: 1960, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1314, positive: 1306, positive conditional: 0, positive unconditional: 1306, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1314, positive: 1306, positive conditional: 0, positive unconditional: 1306, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 38, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1988, positive: 654, positive conditional: 0, positive unconditional: 654, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1314, unknown conditional: 0, unknown unconditional: 1314] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 153]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 236 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 303407.6ms, OverallIterations: 56, TraceHistogramMax: 7, EmptinessCheckTime: 98.5ms, AutomataDifference: 74152.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11235.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1638 SDtfs, 6757 SDslu, 18049 SDs, 0 SdLazy, 26274 SolverSat, 2332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23115.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2757 GetRequests, 1072 SyntacticMatches, 1 SemanticMatches, 1684 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14262 ImplicationChecksByTransitivity, 92796.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=809occurred in iteration=39, InterpolantAutomatonStates: 1043, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 732.8ms AutomataMinimizationTime, 56 MinimizatonAttempts, 6547 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1273.4ms SsaConstructionTime, 14972.2ms SatisfiabilityAnalysisTime, 134530.3ms InterpolantComputationTime, 3288 NumberOfCodeBlocks, 3284 NumberOfCodeBlocksAsserted, 207 NumberOfCheckSat, 3181 ConstructedInterpolants, 147 QuantifiedInterpolants, 69627 SizeOfPredicates, 1383 NumberOfNonLiveVariables, 14448 ConjunctsInSsa, 1302 ConjunctsInUnsatCore, 107 InterpolantComputations, 6 PerfectInterpolantSequences, 890/2573 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 23:22:54,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...