/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 15:51:40,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 15:51:40,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 15:51:40,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 15:51:40,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 15:51:40,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 15:51:40,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 15:51:40,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-08 15:51:40,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 15:51:40,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 15:51:40,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 15:51:40,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 15:51:40,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 15:51:40,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 15:51:40,487 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 15:51:40,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 15:51:40,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 15:51:40,489 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 15:51:40,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 15:51:40,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 15:51:40,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 15:51:40,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-08 15:51:40,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 15:51:40,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-08 15:51:40,491 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-08 15:51:40,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 15:51:40,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-08 15:51:40,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 15:51:40,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-08 15:51:40,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 15:51:40,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 15:51:40,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 15:51:40,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 15:51:40,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 15:51:40,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 15:51:40,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-08 15:51:40,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-08 15:51:40,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-08 15:51:40,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-08 15:51:40,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 15:51:40,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 15:51:40,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 15:51:40,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 15:51:40,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 15:51:40,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 15:51:40,958 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 15:51:40,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-08 15:51:41,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40f12f477/dc71978fce6c40ecbe7b6afd38111914/FLAGa514b4403 [2021-10-08 15:51:41,654 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 15:51:41,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-08 15:51:41,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40f12f477/dc71978fce6c40ecbe7b6afd38111914/FLAGa514b4403 [2021-10-08 15:51:42,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40f12f477/dc71978fce6c40ecbe7b6afd38111914 [2021-10-08 15:51:42,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 15:51:42,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-08 15:51:42,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 15:51:42,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 15:51:42,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 15:51:42,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c2f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42, skipping insertion in model container [2021-10-08 15:51:42,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 15:51:42,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 15:51:42,281 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/parallel-misc-3-extended.wvr.c[2591,2604] [2021-10-08 15:51:42,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 15:51:42,294 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 15:51:42,325 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/parallel-misc-3-extended.wvr.c[2591,2604] [2021-10-08 15:51:42,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 15:51:42,346 INFO L208 MainTranslator]: Completed translation [2021-10-08 15:51:42,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42 WrapperNode [2021-10-08 15:51:42,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 15:51:42,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 15:51:42,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 15:51:42,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 15:51:42,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 15:51:42,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 15:51:42,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 15:51:42,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 15:51:42,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 15:51:42,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 15:51:42,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 15:51:42,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 15:51:42,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 15:51:42,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:42,479 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) [2021-10-08 15:51:42,508 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 [2021-10-08 15:51:42,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 15:51:42,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 15:51:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 15:51:42,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 15:51:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 15:51:42,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 15:51:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-08 15:51:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 15:51:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-08 15:51:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 15:51:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 15:51:42,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 15:51:42,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 15:51:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-08 15:51:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 15:51:42,582 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 15:51:43,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 15:51:43,216 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-08 15:51:43,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:51:43 BoogieIcfgContainer [2021-10-08 15:51:43,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 15:51:43,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 15:51:43,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 15:51:43,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 15:51:43,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 03:51:42" (1/3) ... [2021-10-08 15:51:43,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d528048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 03:51:43, skipping insertion in model container [2021-10-08 15:51:43,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (2/3) ... [2021-10-08 15:51:43,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d528048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 03:51:43, skipping insertion in model container [2021-10-08 15:51:43,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:51:43" (3/3) ... [2021-10-08 15:51:43,236 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2021-10-08 15:51:43,244 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-08 15:51:43,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 15:51:43,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-10-08 15:51:43,245 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 15:51:43,290 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,290 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,291 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,291 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,291 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,292 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,293 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,293 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,293 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,295 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,295 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,296 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,296 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,296 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,296 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,297 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,297 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,297 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,298 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,299 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,299 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,299 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,301 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,301 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,302 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,302 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,302 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,303 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,303 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,303 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,304 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,304 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,305 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,305 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,306 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,307 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,307 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,307 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,307 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,308 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,308 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,308 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,313 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,314 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,314 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,321 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,321 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,321 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,333 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 15:51:43,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 15:51:43,400 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 [2021-10-08 15:51:43,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-08 15:51:43,421 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 15:51:43,434 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 142 transitions, 308 flow [2021-10-08 15:51:43,438 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 142 transitions, 308 flow [2021-10-08 15:51:43,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 142 transitions, 308 flow [2021-10-08 15:51:43,517 INFO L129 PetriNetUnfolder]: 16/139 cut-off events. [2021-10-08 15:51:43,517 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 15:51:43,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 16/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 242 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2021-10-08 15:51:43,534 INFO L116 LiptonReduction]: Number of co-enabled transitions 5030 [2021-10-08 15:51:49,403 INFO L131 LiptonReduction]: Checked pairs total: 9636 [2021-10-08 15:51:49,403 INFO L133 LiptonReduction]: Total number of compositions: 127 [2021-10-08 15:51:49,420 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 44 transitions, 112 flow [2021-10-08 15:51:49,525 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 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) [2021-10-08 15:51:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 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) [2021-10-08 15:51:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 15:51:49,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:49,542 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 15:51:49,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash 592693, now seen corresponding path program 1 times [2021-10-08 15:51:49,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:49,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722384279] [2021-10-08 15:51:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:49,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:49,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:49,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722384279] [2021-10-08 15:51:49,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722384279] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:49,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:49,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-08 15:51:49,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903449386] [2021-10-08 15:51:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:51:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:51:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:49,791 INFO L87 Difference]: Start difference. First operand has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-08 15:51:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:49,957 INFO L93 Difference]: Finished difference Result 1798 states and 6388 transitions. [2021-10-08 15:51:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:51:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-10-08 15:51:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:50,011 INFO L225 Difference]: With dead ends: 1798 [2021-10-08 15:51:50,011 INFO L226 Difference]: Without dead ends: 1798 [2021-10-08 15:51:50,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-08 15:51:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1762. [2021-10-08 15:51:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1638 states have (on average 3.851037851037851) internal successors, (6308), 1761 states have internal predecessors, (6308), 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) [2021-10-08 15:51:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6308 transitions. [2021-10-08 15:51:50,201 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6308 transitions. Word has length 3 [2021-10-08 15:51:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:50,202 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 6308 transitions. [2021-10-08 15:51:50,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-08 15:51:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6308 transitions. [2021-10-08 15:51:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 15:51:50,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:50,203 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 15:51:50,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-08 15:51:50,206 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash 18375068, now seen corresponding path program 1 times [2021-10-08 15:51:50,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:50,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859019451] [2021-10-08 15:51:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:50,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:50,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:50,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859019451] [2021-10-08 15:51:50,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859019451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:50,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452728118] [2021-10-08 15:51:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:50,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:50,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:50,372 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) [2021-10-08 15:51:50,384 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 [2021-10-08 15:51:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 15:51:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452728118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:50,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 15:51:50,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381146450] [2021-10-08 15:51:50,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 15:51:50,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 15:51:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-08 15:51:50,974 INFO L87 Difference]: Start difference. First operand 1762 states and 6308 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-08 15:51:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:51,303 INFO L93 Difference]: Finished difference Result 5052 states and 17073 transitions. [2021-10-08 15:51:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 15:51:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 4 [2021-10-08 15:51:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:51,418 INFO L225 Difference]: With dead ends: 5052 [2021-10-08 15:51:51,419 INFO L226 Difference]: Without dead ends: 5052 [2021-10-08 15:51:51,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-08 15:51:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-10-08 15:51:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 3060. [2021-10-08 15:51:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2936 states have (on average 4.202656675749319) internal successors, (12339), 3059 states have internal predecessors, (12339), 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) [2021-10-08 15:51:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 12339 transitions. [2021-10-08 15:51:51,604 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 12339 transitions. Word has length 4 [2021-10-08 15:51:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:51,605 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 12339 transitions. [2021-10-08 15:51:51,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-08 15:51:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 12339 transitions. [2021-10-08 15:51:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 15:51:51,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:51,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 15:51:51,645 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 [2021-10-08 15:51:51,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:51,822 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash 18375070, now seen corresponding path program 1 times [2021-10-08 15:51:51,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:51,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66748665] [2021-10-08 15:51:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:51,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:51,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:51,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66748665] [2021-10-08 15:51:51,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66748665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:51,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602035414] [2021-10-08 15:51:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:51,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:51,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:51,965 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) [2021-10-08 15:51:51,990 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 [2021-10-08 15:51:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 15:51:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:52,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602035414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:52,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:52,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 15:51:52,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384979395] [2021-10-08 15:51:52,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 15:51:52,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 15:51:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 15:51:52,181 INFO L87 Difference]: Start difference. First operand 3060 states and 12339 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-08 15:51:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:52,583 INFO L93 Difference]: Finished difference Result 5570 states and 21636 transitions. [2021-10-08 15:51:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 15:51:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 4 [2021-10-08 15:51:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:52,674 INFO L225 Difference]: With dead ends: 5570 [2021-10-08 15:51:52,675 INFO L226 Difference]: Without dead ends: 5570 [2021-10-08 15:51:52,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-08 15:51:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-10-08 15:51:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3978. [2021-10-08 15:51:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3854 states have (on average 4.459782044628957) internal successors, (17188), 3977 states have internal predecessors, (17188), 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) [2021-10-08 15:51:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 17188 transitions. [2021-10-08 15:51:52,924 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 17188 transitions. Word has length 4 [2021-10-08 15:51:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:52,925 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 17188 transitions. [2021-10-08 15:51:52,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-08 15:51:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 17188 transitions. [2021-10-08 15:51:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 15:51:52,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:52,936 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-08 15:51:52,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-08 15:51:53,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:53,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash 569628678, now seen corresponding path program 1 times [2021-10-08 15:51:53,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:53,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273447552] [2021-10-08 15:51:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:53,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:51:53,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:53,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273447552] [2021-10-08 15:51:53,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273447552] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:53,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:53,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:51:53,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285333551] [2021-10-08 15:51:53,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:51:53,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:51:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:53,194 INFO L87 Difference]: Start difference. First operand 3978 states and 17188 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-08 15:51:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:53,420 INFO L93 Difference]: Finished difference Result 5936 states and 24801 transitions. [2021-10-08 15:51:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:51:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-10-08 15:51:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:53,486 INFO L225 Difference]: With dead ends: 5936 [2021-10-08 15:51:53,487 INFO L226 Difference]: Without dead ends: 5936 [2021-10-08 15:51:53,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-10-08 15:51:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 5210. [2021-10-08 15:51:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5086 states have (on average 4.579630357845065) internal successors, (23292), 5209 states have internal predecessors, (23292), 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) [2021-10-08 15:51:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 23292 transitions. [2021-10-08 15:51:53,915 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 23292 transitions. Word has length 5 [2021-10-08 15:51:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 23292 transitions. [2021-10-08 15:51:53,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-08 15:51:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 23292 transitions. [2021-10-08 15:51:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 15:51:53,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:53,922 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-08 15:51:53,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-08 15:51:53,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 569628679, now seen corresponding path program 1 times [2021-10-08 15:51:53,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:53,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343623202] [2021-10-08 15:51:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:53,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:54,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:54,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343623202] [2021-10-08 15:51:54,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343623202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:54,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158185638] [2021-10-08 15:51:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:54,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:54,113 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) [2021-10-08 15:51:54,114 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 [2021-10-08 15:51:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 15:51:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158185638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:54,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:54,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 15:51:54,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320679349] [2021-10-08 15:51:54,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 15:51:54,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 15:51:54,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-08 15:51:54,711 INFO L87 Difference]: Start difference. First operand 5210 states and 23292 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-10-08 15:51:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:55,327 INFO L93 Difference]: Finished difference Result 10108 states and 38674 transitions. [2021-10-08 15:51:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 15:51:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 5 [2021-10-08 15:51:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:55,431 INFO L225 Difference]: With dead ends: 10108 [2021-10-08 15:51:55,432 INFO L226 Difference]: Without dead ends: 10108 [2021-10-08 15:51:55,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-10-08 15:51:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2021-10-08 15:51:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 6526. [2021-10-08 15:51:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6402 states have (on average 4.260699781318338) internal successors, (27277), 6525 states have internal predecessors, (27277), 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) [2021-10-08 15:51:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 27277 transitions. [2021-10-08 15:51:55,932 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 27277 transitions. Word has length 5 [2021-10-08 15:51:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:55,932 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 27277 transitions. [2021-10-08 15:51:55,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-10-08 15:51:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 27277 transitions. [2021-10-08 15:51:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 15:51:55,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:55,935 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2021-10-08 15:51:55,981 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 [2021-10-08 15:51:56,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:56,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash 478621886, now seen corresponding path program 2 times [2021-10-08 15:51:56,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:56,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061862763] [2021-10-08 15:51:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:56,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:51:56,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:56,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061862763] [2021-10-08 15:51:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061862763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:56,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048678371] [2021-10-08 15:51:56,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:51:56,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:56,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:56,221 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) [2021-10-08 15:51:56,239 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 [2021-10-08 15:51:56,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:51:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:51:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 15:51:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:56,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048678371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:56,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:56,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-08 15:51:56,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526721537] [2021-10-08 15:51:56,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 15:51:56,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 15:51:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-08 15:51:56,898 INFO L87 Difference]: Start difference. First operand 6526 states and 27277 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-10-08 15:51:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:57,446 INFO L93 Difference]: Finished difference Result 14284 states and 53230 transitions. [2021-10-08 15:51:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 15:51:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 6 [2021-10-08 15:51:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:57,663 INFO L225 Difference]: With dead ends: 14284 [2021-10-08 15:51:57,663 INFO L226 Difference]: Without dead ends: 14268 [2021-10-08 15:51:57,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-08 15:51:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2021-10-08 15:51:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 7934. [2021-10-08 15:51:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7810 states have (on average 4.276696542893726) internal successors, (33401), 7933 states have internal predecessors, (33401), 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) [2021-10-08 15:51:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 33401 transitions. [2021-10-08 15:51:58,273 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 33401 transitions. Word has length 6 [2021-10-08 15:51:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:58,274 INFO L470 AbstractCegarLoop]: Abstraction has 7934 states and 33401 transitions. [2021-10-08 15:51:58,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-10-08 15:51:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 33401 transitions. [2021-10-08 15:51:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:51:58,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:58,278 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:58,320 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 [2021-10-08 15:51:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:58,493 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -121263379, now seen corresponding path program 1 times [2021-10-08 15:51:58,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:58,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707183586] [2021-10-08 15:51:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:58,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:51:58,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707183586] [2021-10-08 15:51:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707183586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:58,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:58,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:51:58,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975642785] [2021-10-08 15:51:58,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:51:58,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:51:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:58,663 INFO L87 Difference]: Start difference. First operand 7934 states and 33401 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-08 15:51:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:58,920 INFO L93 Difference]: Finished difference Result 10434 states and 42785 transitions. [2021-10-08 15:51:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:51:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2021-10-08 15:51:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:59,003 INFO L225 Difference]: With dead ends: 10434 [2021-10-08 15:51:59,004 INFO L226 Difference]: Without dead ends: 10434 [2021-10-08 15:51:59,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10434 states. [2021-10-08 15:51:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10434 to 7912. [2021-10-08 15:51:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7912 states, 7788 states have (on average 4.317668207498716) internal successors, (33626), 7911 states have internal predecessors, (33626), 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) [2021-10-08 15:51:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7912 states to 7912 states and 33626 transitions. [2021-10-08 15:51:59,665 INFO L78 Accepts]: Start accepts. Automaton has 7912 states and 33626 transitions. Word has length 8 [2021-10-08 15:51:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:59,665 INFO L470 AbstractCegarLoop]: Abstraction has 7912 states and 33626 transitions. [2021-10-08 15:51:59,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-08 15:51:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7912 states and 33626 transitions. [2021-10-08 15:51:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:51:59,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:59,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:59,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-08 15:51:59,669 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:51:59,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash -236535499, now seen corresponding path program 1 times [2021-10-08 15:51:59,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:59,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70716054] [2021-10-08 15:51:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:59,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:59,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:59,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70716054] [2021-10-08 15:51:59,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70716054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:59,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163584372] [2021-10-08 15:51:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:59,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:59,742 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) [2021-10-08 15:51:59,763 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 [2021-10-08 15:51:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 15:51:59,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163584372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:59,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:59,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-08 15:51:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966586538] [2021-10-08 15:51:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:51:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:51:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:59,872 INFO L87 Difference]: Start difference. First operand 7912 states and 33626 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-08 15:52:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:00,121 INFO L93 Difference]: Finished difference Result 13154 states and 53132 transitions. [2021-10-08 15:52:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:52:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 8 [2021-10-08 15:52:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:00,365 INFO L225 Difference]: With dead ends: 13154 [2021-10-08 15:52:00,365 INFO L226 Difference]: Without dead ends: 13154 [2021-10-08 15:52:00,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13154 states. [2021-10-08 15:52:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13154 to 9674. [2021-10-08 15:52:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 9550 states have (on average 4.425968586387435) internal successors, (42268), 9673 states have internal predecessors, (42268), 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) [2021-10-08 15:52:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 42268 transitions. [2021-10-08 15:52:00,950 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 42268 transitions. Word has length 8 [2021-10-08 15:52:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:00,950 INFO L470 AbstractCegarLoop]: Abstraction has 9674 states and 42268 transitions. [2021-10-08 15:52:00,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-08 15:52:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 42268 transitions. [2021-10-08 15:52:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 15:52:00,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:00,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:01,016 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 [2021-10-08 15:52:01,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:01,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:01,176 INFO L82 PathProgramCache]: Analyzing trace with hash 424109002, now seen corresponding path program 1 times [2021-10-08 15:52:01,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:01,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332125875] [2021-10-08 15:52:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:01,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:01,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:01,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332125875] [2021-10-08 15:52:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332125875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:01,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559954190] [2021-10-08 15:52:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:01,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:01,259 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) [2021-10-08 15:52:01,264 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 [2021-10-08 15:52:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 15:52:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:01,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559954190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:01,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:01,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-08 15:52:01,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012414832] [2021-10-08 15:52:01,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 15:52:01,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 15:52:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-10-08 15:52:01,733 INFO L87 Difference]: Start difference. First operand 9674 states and 42268 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-10-08 15:52:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:02,256 INFO L93 Difference]: Finished difference Result 17064 states and 70852 transitions. [2021-10-08 15:52:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 15:52:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 9 [2021-10-08 15:52:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:02,506 INFO L225 Difference]: With dead ends: 17064 [2021-10-08 15:52:02,507 INFO L226 Difference]: Without dead ends: 17062 [2021-10-08 15:52:02,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:52:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17062 states. [2021-10-08 15:52:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17062 to 12038. [2021-10-08 15:52:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12038 states, 11914 states have (on average 4.404314252140339) internal successors, (52473), 12037 states have internal predecessors, (52473), 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) [2021-10-08 15:52:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12038 states to 12038 states and 52473 transitions. [2021-10-08 15:52:03,180 INFO L78 Accepts]: Start accepts. Automaton has 12038 states and 52473 transitions. Word has length 9 [2021-10-08 15:52:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:03,180 INFO L470 AbstractCegarLoop]: Abstraction has 12038 states and 52473 transitions. [2021-10-08 15:52:03,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-10-08 15:52:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12038 states and 52473 transitions. [2021-10-08 15:52:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 15:52:03,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:03,182 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:03,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:03,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:03,397 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:03,398 INFO L82 PathProgramCache]: Analyzing trace with hash -569698805, now seen corresponding path program 1 times [2021-10-08 15:52:03,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:03,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880774677] [2021-10-08 15:52:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:03,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:03,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:03,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880774677] [2021-10-08 15:52:03,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880774677] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:03,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:03,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:52:03,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675764986] [2021-10-08 15:52:03,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:52:03,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:52:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:03,454 INFO L87 Difference]: Start difference. First operand 12038 states and 52473 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-10-08 15:52:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:03,814 INFO L93 Difference]: Finished difference Result 15598 states and 66036 transitions. [2021-10-08 15:52:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:52:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2021-10-08 15:52:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:03,901 INFO L225 Difference]: With dead ends: 15598 [2021-10-08 15:52:03,901 INFO L226 Difference]: Without dead ends: 15598 [2021-10-08 15:52:03,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2021-10-08 15:52:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 12036. [2021-10-08 15:52:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12036 states, 11912 states have (on average 4.41714237743452) internal successors, (52617), 12035 states have internal predecessors, (52617), 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) [2021-10-08 15:52:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12036 states to 12036 states and 52617 transitions. [2021-10-08 15:52:04,654 INFO L78 Accepts]: Start accepts. Automaton has 12036 states and 52617 transitions. Word has length 10 [2021-10-08 15:52:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:04,655 INFO L470 AbstractCegarLoop]: Abstraction has 12036 states and 52617 transitions. [2021-10-08 15:52:04,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-10-08 15:52:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 12036 states and 52617 transitions. [2021-10-08 15:52:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 15:52:04,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:04,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:04,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-08 15:52:04,657 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash 262478411, now seen corresponding path program 1 times [2021-10-08 15:52:04,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:04,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220351514] [2021-10-08 15:52:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:04,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:04,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:04,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220351514] [2021-10-08 15:52:04,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220351514] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:04,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:04,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:04,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685533432] [2021-10-08 15:52:04,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:52:04,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:52:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:04,708 INFO L87 Difference]: Start difference. First operand 12036 states and 52617 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-08 15:52:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:05,290 INFO L93 Difference]: Finished difference Result 20432 states and 83619 transitions. [2021-10-08 15:52:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:52:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-08 15:52:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:05,397 INFO L225 Difference]: With dead ends: 20432 [2021-10-08 15:52:05,397 INFO L226 Difference]: Without dead ends: 20432 [2021-10-08 15:52:05,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20432 states. [2021-10-08 15:52:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20432 to 16314. [2021-10-08 15:52:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16314 states, 16190 states have (on average 4.392958616429895) internal successors, (71122), 16313 states have internal predecessors, (71122), 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) [2021-10-08 15:52:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16314 states to 16314 states and 71122 transitions. [2021-10-08 15:52:06,306 INFO L78 Accepts]: Start accepts. Automaton has 16314 states and 71122 transitions. Word has length 10 [2021-10-08 15:52:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:06,307 INFO L470 AbstractCegarLoop]: Abstraction has 16314 states and 71122 transitions. [2021-10-08 15:52:06,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-08 15:52:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 16314 states and 71122 transitions. [2021-10-08 15:52:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 15:52:06,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:06,308 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:06,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-08 15:52:06,309 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash 322723989, now seen corresponding path program 2 times [2021-10-08 15:52:06,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:06,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660220935] [2021-10-08 15:52:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:06,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:06,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:06,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660220935] [2021-10-08 15:52:06,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660220935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:06,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518975646] [2021-10-08 15:52:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:52:06,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:06,392 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) [2021-10-08 15:52:06,394 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 [2021-10-08 15:52:06,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:52:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 15:52:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:06,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518975646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:06,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:06,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-08 15:52:06,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026405559] [2021-10-08 15:52:06,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 15:52:06,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 15:52:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:52:06,748 INFO L87 Difference]: Start difference. First operand 16314 states and 71122 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-10-08 15:52:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:07,676 INFO L93 Difference]: Finished difference Result 34370 states and 141660 transitions. [2021-10-08 15:52:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 15:52:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 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 10 [2021-10-08 15:52:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:08,103 INFO L225 Difference]: With dead ends: 34370 [2021-10-08 15:52:08,103 INFO L226 Difference]: Without dead ends: 34370 [2021-10-08 15:52:08,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-10-08 15:52:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34370 states. [2021-10-08 15:52:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34370 to 19950. [2021-10-08 15:52:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19826 states have (on average 4.509280742459397) internal successors, (89401), 19949 states have internal predecessors, (89401), 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) [2021-10-08 15:52:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 89401 transitions. [2021-10-08 15:52:09,157 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 89401 transitions. Word has length 10 [2021-10-08 15:52:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:09,157 INFO L470 AbstractCegarLoop]: Abstraction has 19950 states and 89401 transitions. [2021-10-08 15:52:09,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-10-08 15:52:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 89401 transitions. [2021-10-08 15:52:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:52:09,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:09,158 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:09,183 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 [2021-10-08 15:52:09,359 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 [2021-10-08 15:52:09,360 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1346542294, now seen corresponding path program 3 times [2021-10-08 15:52:09,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:09,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588310221] [2021-10-08 15:52:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:09,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:09,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:09,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588310221] [2021-10-08 15:52:09,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588310221] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:09,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035993982] [2021-10-08 15:52:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 15:52:09,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:09,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:09,439 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) [2021-10-08 15:52:09,470 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 [2021-10-08 15:52:09,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 15:52:09,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 15:52:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:10,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035993982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:10,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:10,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-08 15:52:10,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979244564] [2021-10-08 15:52:10,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 15:52:10,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 15:52:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:52:10,511 INFO L87 Difference]: Start difference. First operand 19950 states and 89401 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-10-08 15:52:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:11,362 INFO L93 Difference]: Finished difference Result 40126 states and 174241 transitions. [2021-10-08 15:52:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 15:52:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 11 [2021-10-08 15:52:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:11,937 INFO L225 Difference]: With dead ends: 40126 [2021-10-08 15:52:11,937 INFO L226 Difference]: Without dead ends: 40126 [2021-10-08 15:52:11,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-10-08 15:52:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40126 states. [2021-10-08 15:52:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40126 to 27674. [2021-10-08 15:52:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27674 states, 27550 states have (on average 4.623557168784029) internal successors, (127379), 27673 states have internal predecessors, (127379), 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) [2021-10-08 15:52:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27674 states to 27674 states and 127379 transitions. [2021-10-08 15:52:13,626 INFO L78 Accepts]: Start accepts. Automaton has 27674 states and 127379 transitions. Word has length 11 [2021-10-08 15:52:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:13,627 INFO L470 AbstractCegarLoop]: Abstraction has 27674 states and 127379 transitions. [2021-10-08 15:52:13,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-10-08 15:52:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 27674 states and 127379 transitions. [2021-10-08 15:52:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:52:13,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:13,636 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:13,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:13,839 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 [2021-10-08 15:52:13,841 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:13,842 INFO L82 PathProgramCache]: Analyzing trace with hash -453070358, now seen corresponding path program 4 times [2021-10-08 15:52:13,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:13,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093194445] [2021-10-08 15:52:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:13,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:13,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:13,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093194445] [2021-10-08 15:52:13,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093194445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:13,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122260876] [2021-10-08 15:52:13,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 15:52:13,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:13,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:13,969 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) [2021-10-08 15:52:13,983 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 [2021-10-08 15:52:14,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 15:52:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 15:52:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:14,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122260876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:14,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:14,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-08 15:52:14,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188069415] [2021-10-08 15:52:14,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 15:52:14,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 15:52:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:52:14,799 INFO L87 Difference]: Start difference. First operand 27674 states and 127379 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-10-08 15:52:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:16,695 INFO L93 Difference]: Finished difference Result 50334 states and 217332 transitions. [2021-10-08 15:52:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 15:52:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 11 [2021-10-08 15:52:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:16,984 INFO L225 Difference]: With dead ends: 50334 [2021-10-08 15:52:16,984 INFO L226 Difference]: Without dead ends: 50330 [2021-10-08 15:52:16,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-08 15:52:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50330 states. [2021-10-08 15:52:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50330 to 36126. [2021-10-08 15:52:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36002 states have (on average 4.6749625020832175) internal successors, (168308), 36125 states have internal predecessors, (168308), 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) [2021-10-08 15:52:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 168308 transitions. [2021-10-08 15:52:18,821 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 168308 transitions. Word has length 11 [2021-10-08 15:52:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:18,822 INFO L470 AbstractCegarLoop]: Abstraction has 36126 states and 168308 transitions. [2021-10-08 15:52:18,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-10-08 15:52:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 168308 transitions. [2021-10-08 15:52:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:52:19,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:19,163 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:19,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-08 15:52:19,363 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 [2021-10-08 15:52:19,364 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash -453071366, now seen corresponding path program 2 times [2021-10-08 15:52:19,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:19,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968985883] [2021-10-08 15:52:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:19,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:19,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:19,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968985883] [2021-10-08 15:52:19,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968985883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:19,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140418803] [2021-10-08 15:52:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:52:19,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:19,429 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) [2021-10-08 15:52:19,452 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 [2021-10-08 15:52:19,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:52:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 15:52:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:19,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140418803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:19,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:19,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2021-10-08 15:52:19,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48270113] [2021-10-08 15:52:19,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 15:52:19,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 15:52:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-08 15:52:19,976 INFO L87 Difference]: Start difference. First operand 36126 states and 168308 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-10-08 15:52:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:21,701 INFO L93 Difference]: Finished difference Result 49110 states and 218535 transitions. [2021-10-08 15:52:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 15:52:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 11 [2021-10-08 15:52:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:21,997 INFO L225 Difference]: With dead ends: 49110 [2021-10-08 15:52:21,998 INFO L226 Difference]: Without dead ends: 49102 [2021-10-08 15:52:22,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-08 15:52:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49102 states. [2021-10-08 15:52:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49102 to 40836. [2021-10-08 15:52:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40836 states, 40712 states have (on average 4.641923757123207) internal successors, (188982), 40835 states have internal predecessors, (188982), 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) [2021-10-08 15:52:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40836 states to 40836 states and 188982 transitions. [2021-10-08 15:52:23,803 INFO L78 Accepts]: Start accepts. Automaton has 40836 states and 188982 transitions. Word has length 11 [2021-10-08 15:52:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:23,803 INFO L470 AbstractCegarLoop]: Abstraction has 40836 states and 188982 transitions. [2021-10-08 15:52:23,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-10-08 15:52:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 40836 states and 188982 transitions. [2021-10-08 15:52:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 15:52:23,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:23,807 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:23,834 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 [2021-10-08 15:52:24,018 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 [2021-10-08 15:52:24,019 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1933370579, now seen corresponding path program 5 times [2021-10-08 15:52:24,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:24,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78063901] [2021-10-08 15:52:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:24,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:24,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:24,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78063901] [2021-10-08 15:52:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78063901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:24,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019169099] [2021-10-08 15:52:24,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 15:52:24,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:24,194 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) [2021-10-08 15:52:24,201 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 [2021-10-08 15:52:24,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 15:52:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:24,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 15:52:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019169099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:25,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-10-08 15:52:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019352121] [2021-10-08 15:52:25,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 15:52:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 15:52:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-08 15:52:25,528 INFO L87 Difference]: Start difference. First operand 40836 states and 188982 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2021-10-08 15:52:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:27,767 INFO L93 Difference]: Finished difference Result 75042 states and 331059 transitions. [2021-10-08 15:52:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-08 15:52:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 12 [2021-10-08 15:52:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:28,252 INFO L225 Difference]: With dead ends: 75042 [2021-10-08 15:52:28,252 INFO L226 Difference]: Without dead ends: 75024 [2021-10-08 15:52:28,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-10-08 15:52:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75024 states. [2021-10-08 15:52:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75024 to 47100. [2021-10-08 15:52:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47100 states, 46976 states have (on average 4.732565565395095) internal successors, (222317), 47099 states have internal predecessors, (222317), 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) [2021-10-08 15:52:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47100 states to 47100 states and 222317 transitions. [2021-10-08 15:52:31,127 INFO L78 Accepts]: Start accepts. Automaton has 47100 states and 222317 transitions. Word has length 12 [2021-10-08 15:52:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:31,127 INFO L470 AbstractCegarLoop]: Abstraction has 47100 states and 222317 transitions. [2021-10-08 15:52:31,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2021-10-08 15:52:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 47100 states and 222317 transitions. [2021-10-08 15:52:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 15:52:31,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:31,132 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:31,157 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 [2021-10-08 15:52:31,332 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 [2021-10-08 15:52:31,333 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1933369571, now seen corresponding path program 3 times [2021-10-08 15:52:31,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:31,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070618873] [2021-10-08 15:52:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:31,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:31,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:31,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070618873] [2021-10-08 15:52:31,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070618873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:31,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763341374] [2021-10-08 15:52:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 15:52:31,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:31,504 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) [2021-10-08 15:52:31,505 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 [2021-10-08 15:52:31,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-08 15:52:31,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:31,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 15:52:31,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763341374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:32,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:32,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2021-10-08 15:52:32,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879191712] [2021-10-08 15:52:32,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 15:52:32,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 15:52:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-08 15:52:32,348 INFO L87 Difference]: Start difference. First operand 47100 states and 222317 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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) [2021-10-08 15:52:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:35,639 INFO L93 Difference]: Finished difference Result 103340 states and 452367 transitions. [2021-10-08 15:52:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-08 15:52:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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 12 [2021-10-08 15:52:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:36,960 INFO L225 Difference]: With dead ends: 103340 [2021-10-08 15:52:36,960 INFO L226 Difference]: Without dead ends: 103272 [2021-10-08 15:52:36,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-10-08 15:52:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103272 states. [2021-10-08 15:52:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103272 to 61784. [2021-10-08 15:52:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61784 states, 61660 states have (on average 4.704313979889718) internal successors, (290068), 61783 states have internal predecessors, (290068), 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) [2021-10-08 15:52:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61784 states to 61784 states and 290068 transitions. [2021-10-08 15:52:40,591 INFO L78 Accepts]: Start accepts. Automaton has 61784 states and 290068 transitions. Word has length 12 [2021-10-08 15:52:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:40,592 INFO L470 AbstractCegarLoop]: Abstraction has 61784 states and 290068 transitions. [2021-10-08 15:52:40,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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) [2021-10-08 15:52:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 61784 states and 290068 transitions. [2021-10-08 15:52:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 15:52:40,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:40,596 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:40,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-08 15:52:40,811 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 [2021-10-08 15:52:40,812 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 625665072, now seen corresponding path program 6 times [2021-10-08 15:52:40,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:40,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42244709] [2021-10-08 15:52:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:40,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:40,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:40,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42244709] [2021-10-08 15:52:40,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42244709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:40,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431383769] [2021-10-08 15:52:40,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 15:52:40,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:40,984 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) [2021-10-08 15:52:41,007 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 [2021-10-08 15:52:41,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-08 15:52:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 15:52:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 15:52:41,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431383769] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:41,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-08 15:52:41,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-08 15:52:41,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444134215] [2021-10-08 15:52:41,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:41,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:52:41,274 INFO L87 Difference]: Start difference. First operand 61784 states and 290068 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-08 15:52:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:42,417 INFO L93 Difference]: Finished difference Result 61480 states and 280401 transitions. [2021-10-08 15:52:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-08 15:52:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:43,271 INFO L225 Difference]: With dead ends: 61480 [2021-10-08 15:52:43,271 INFO L226 Difference]: Without dead ends: 61312 [2021-10-08 15:52:43,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:52:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61312 states. [2021-10-08 15:52:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61312 to 51038. [2021-10-08 15:52:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51038 states, 50914 states have (on average 4.59942255568213) internal successors, (234175), 51037 states have internal predecessors, (234175), 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) [2021-10-08 15:52:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51038 states to 51038 states and 234175 transitions. [2021-10-08 15:52:45,648 INFO L78 Accepts]: Start accepts. Automaton has 51038 states and 234175 transitions. Word has length 13 [2021-10-08 15:52:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:45,649 INFO L470 AbstractCegarLoop]: Abstraction has 51038 states and 234175 transitions. [2021-10-08 15:52:45,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-08 15:52:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51038 states and 234175 transitions. [2021-10-08 15:52:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 15:52:45,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:45,659 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:45,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-08 15:52:45,868 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 [2021-10-08 15:52:45,869 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash -267144052, now seen corresponding path program 1 times [2021-10-08 15:52:45,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:45,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852388355] [2021-10-08 15:52:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:45,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:45,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:45,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852388355] [2021-10-08 15:52:45,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852388355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:45,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730369852] [2021-10-08 15:52:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:45,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:45,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:45,918 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) [2021-10-08 15:52:45,924 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 [2021-10-08 15:52:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:46,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 15:52:46,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730369852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:46,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:46,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-08 15:52:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730848250] [2021-10-08 15:52:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 15:52:46,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 15:52:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:52:46,332 INFO L87 Difference]: Start difference. First operand 51038 states and 234175 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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) [2021-10-08 15:52:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:48,094 INFO L93 Difference]: Finished difference Result 84886 states and 378990 transitions. [2021-10-08 15:52:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 15:52:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 14 [2021-10-08 15:52:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:49,169 INFO L225 Difference]: With dead ends: 84886 [2021-10-08 15:52:49,170 INFO L226 Difference]: Without dead ends: 84792 [2021-10-08 15:52:49,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-10-08 15:52:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84792 states. [2021-10-08 15:52:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84792 to 63468. [2021-10-08 15:52:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63468 states, 63344 states have (on average 4.721299570598636) internal successors, (299066), 63467 states have internal predecessors, (299066), 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) [2021-10-08 15:52:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63468 states to 63468 states and 299066 transitions. [2021-10-08 15:52:52,665 INFO L78 Accepts]: Start accepts. Automaton has 63468 states and 299066 transitions. Word has length 14 [2021-10-08 15:52:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:52,669 INFO L470 AbstractCegarLoop]: Abstraction has 63468 states and 299066 transitions. [2021-10-08 15:52:52,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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) [2021-10-08 15:52:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 63468 states and 299066 transitions. [2021-10-08 15:52:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 15:52:52,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:52,678 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:52,718 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 [2021-10-08 15:52:52,891 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 [2021-10-08 15:52:52,892 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:52:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1784583013, now seen corresponding path program 4 times [2021-10-08 15:52:52,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:52,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110962754] [2021-10-08 15:52:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:52,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:53,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:53,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110962754] [2021-10-08 15:52:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110962754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:53,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755631910] [2021-10-08 15:52:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 15:52:53,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:53,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:53,051 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) [2021-10-08 15:52:53,067 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 [2021-10-08 15:52:53,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 15:52:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 15:52:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 15:52:54,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755631910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:54,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:54,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 15:52:54,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077051154] [2021-10-08 15:52:54,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 15:52:54,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 15:52:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-10-08 15:52:54,266 INFO L87 Difference]: Start difference. First operand 63468 states and 299066 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2021-10-08 15:52:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:57,323 INFO L93 Difference]: Finished difference Result 108214 states and 481870 transitions. [2021-10-08 15:52:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-08 15:52:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 14 [2021-10-08 15:52:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:58,162 INFO L225 Difference]: With dead ends: 108214 [2021-10-08 15:52:58,162 INFO L226 Difference]: Without dead ends: 108068 [2021-10-08 15:52:58,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-10-08 15:52:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108068 states. [2021-10-08 15:53:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108068 to 75548. [2021-10-08 15:53:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75548 states, 75424 states have (on average 4.720394039032668) internal successors, (356031), 75547 states have internal predecessors, (356031), 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) [2021-10-08 15:53:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75548 states to 75548 states and 356031 transitions. [2021-10-08 15:53:02,586 INFO L78 Accepts]: Start accepts. Automaton has 75548 states and 356031 transitions. Word has length 14 [2021-10-08 15:53:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:53:02,586 INFO L470 AbstractCegarLoop]: Abstraction has 75548 states and 356031 transitions. [2021-10-08 15:53:02,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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) [2021-10-08 15:53:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 75548 states and 356031 transitions. [2021-10-08 15:53:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:53:02,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:53:02,593 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:53:02,621 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 [2021-10-08 15:53:02,804 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 [2021-10-08 15:53:02,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:53:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:53:02,806 INFO L82 PathProgramCache]: Analyzing trace with hash -789107435, now seen corresponding path program 2 times [2021-10-08 15:53:02,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:53:02,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618733930] [2021-10-08 15:53:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:53:02,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:53:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:53:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:53:03,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:53:03,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618733930] [2021-10-08 15:53:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618733930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:53:03,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680684175] [2021-10-08 15:53:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:53:03,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:53:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:53:03,708 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) [2021-10-08 15:53:03,708 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 [2021-10-08 15:53:04,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:53:04,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:53:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 15:53:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:53:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:53:05,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680684175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:53:05,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:53:05,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-08 15:53:05,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800974178] [2021-10-08 15:53:05,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-08 15:53:05,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:53:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-08 15:53:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-08 15:53:05,007 INFO L87 Difference]: Start difference. First operand 75548 states and 356031 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2021-10-08 15:53:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:53:09,506 INFO L93 Difference]: Finished difference Result 162506 states and 747152 transitions. [2021-10-08 15:53:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 15:53:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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 15 [2021-10-08 15:53:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:53:11,603 INFO L225 Difference]: With dead ends: 162506 [2021-10-08 15:53:11,604 INFO L226 Difference]: Without dead ends: 162478 [2021-10-08 15:53:11,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-10-08 15:53:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162478 states. [2021-10-08 15:53:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162478 to 104434. [2021-10-08 15:53:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104434 states, 104305 states have (on average 4.867724461914578) internal successors, (507728), 104433 states have internal predecessors, (507728), 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) [2021-10-08 15:53:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104434 states to 104434 states and 507728 transitions. [2021-10-08 15:53:18,834 INFO L78 Accepts]: Start accepts. Automaton has 104434 states and 507728 transitions. Word has length 15 [2021-10-08 15:53:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:53:18,836 INFO L470 AbstractCegarLoop]: Abstraction has 104434 states and 507728 transitions. [2021-10-08 15:53:18,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2021-10-08 15:53:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 104434 states and 507728 transitions. [2021-10-08 15:53:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:53:18,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:53:18,847 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:53:18,884 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 [2021-10-08 15:53:19,060 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 [2021-10-08 15:53:19,061 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:53:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:53:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash -32237175, now seen corresponding path program 1 times [2021-10-08 15:53:19,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:53:19,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692382294] [2021-10-08 15:53:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:53:19,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:53:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:53:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:53:19,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:53:19,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692382294] [2021-10-08 15:53:19,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692382294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:53:19,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910004882] [2021-10-08 15:53:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:53:19,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:53:19,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:53:19,285 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) [2021-10-08 15:53:19,307 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 [2021-10-08 15:53:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:53:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 15:53:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:53:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:53:20,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910004882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:53:20,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:53:20,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2021-10-08 15:53:20,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277252600] [2021-10-08 15:53:20,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 15:53:20,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:53:20,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 15:53:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-08 15:53:20,690 INFO L87 Difference]: Start difference. First operand 104434 states and 507728 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-10-08 15:53:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:53:35,571 INFO L93 Difference]: Finished difference Result 384008 states and 1707497 transitions. [2021-10-08 15:53:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-08 15:53:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 15 [2021-10-08 15:53:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:53:40,048 INFO L225 Difference]: With dead ends: 384008 [2021-10-08 15:53:40,048 INFO L226 Difference]: Without dead ends: 383686 [2021-10-08 15:53:40,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 4853.4ms TimeCoverageRelationStatistics Valid=1161, Invalid=6321, Unknown=0, NotChecked=0, Total=7482 [2021-10-08 15:53:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383686 states. [2021-10-08 15:53:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383686 to 245282. [2021-10-08 15:53:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245282 states, 245153 states have (on average 4.890917100749328) internal successors, (1199023), 245281 states have internal predecessors, (1199023), 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) [2021-10-08 15:54:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245282 states to 245282 states and 1199023 transitions. [2021-10-08 15:54:03,326 INFO L78 Accepts]: Start accepts. Automaton has 245282 states and 1199023 transitions. Word has length 15 [2021-10-08 15:54:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:54:03,327 INFO L470 AbstractCegarLoop]: Abstraction has 245282 states and 1199023 transitions. [2021-10-08 15:54:03,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-10-08 15:54:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 245282 states and 1199023 transitions. [2021-10-08 15:54:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:54:03,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:54:03,338 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:54:03,375 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 [2021-10-08 15:54:03,552 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 [2021-10-08 15:54:03,553 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:54:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:54:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1931853929, now seen corresponding path program 3 times [2021-10-08 15:54:03,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:54:03,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277982202] [2021-10-08 15:54:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:54:03,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:54:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:54:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:54:03,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:54:03,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277982202] [2021-10-08 15:54:03,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277982202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:03,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706966275] [2021-10-08 15:54:03,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 15:54:03,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:54:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:54:03,712 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) [2021-10-08 15:54:03,713 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 [2021-10-08 15:54:04,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 15:54:04,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:54:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 15:54:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:54:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 15:54:04,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706966275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:54:04,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-08 15:54:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-08 15:54:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124646487] [2021-10-08 15:54:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:54:04,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:54:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:54:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:54:04,154 INFO L87 Difference]: Start difference. First operand 245282 states and 1199023 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-08 15:54:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:54:05,810 INFO L93 Difference]: Finished difference Result 96264 states and 425680 transitions. [2021-10-08 15:54:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:54:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 15 [2021-10-08 15:54:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:54:07,110 INFO L225 Difference]: With dead ends: 96264 [2021-10-08 15:54:07,110 INFO L226 Difference]: Without dead ends: 95908 [2021-10-08 15:54:07,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:54:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95908 states. [2021-10-08 15:54:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95908 to 80338. [2021-10-08 15:54:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80338 states, 80210 states have (on average 4.437588829323027) internal successors, (355939), 80337 states have internal predecessors, (355939), 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) [2021-10-08 15:54:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80338 states to 80338 states and 355939 transitions. [2021-10-08 15:54:10,927 INFO L78 Accepts]: Start accepts. Automaton has 80338 states and 355939 transitions. Word has length 15 [2021-10-08 15:54:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:54:10,927 INFO L470 AbstractCegarLoop]: Abstraction has 80338 states and 355939 transitions. [2021-10-08 15:54:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-08 15:54:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 80338 states and 355939 transitions. [2021-10-08 15:54:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:54:10,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:54:10,934 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:54:10,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-08 15:54:11,134 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 [2021-10-08 15:54:11,135 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:54:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:54:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1931853954, now seen corresponding path program 1 times [2021-10-08 15:54:11,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:54:11,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979489222] [2021-10-08 15:54:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:54:11,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:54:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:54:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:54:11,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:54:11,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979489222] [2021-10-08 15:54:11,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979489222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:11,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046798965] [2021-10-08 15:54:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:54:11,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:54:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:54:11,306 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) [2021-10-08 15:54:11,338 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 [2021-10-08 15:54:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:54:11,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 15:54:11,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:54:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:54:13,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046798965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:13,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:54:13,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 15:54:13,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729877973] [2021-10-08 15:54:13,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 15:54:13,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:54:13,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 15:54:13,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-10-08 15:54:13,275 INFO L87 Difference]: Start difference. First operand 80338 states and 355939 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-08 15:54:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:54:17,965 INFO L93 Difference]: Finished difference Result 167018 states and 698581 transitions. [2021-10-08 15:54:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-08 15:54:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-08 15:54:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:54:20,321 INFO L225 Difference]: With dead ends: 167018 [2021-10-08 15:54:20,321 INFO L226 Difference]: Without dead ends: 166966 [2021-10-08 15:54:20,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 755.4ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-10-08 15:54:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166966 states. [2021-10-08 15:54:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166966 to 108536. [2021-10-08 15:54:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108536 states, 108412 states have (on average 4.409760912076154) internal successors, (478071), 108535 states have internal predecessors, (478071), 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) [2021-10-08 15:54:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108536 states to 108536 states and 478071 transitions. [2021-10-08 15:54:26,638 INFO L78 Accepts]: Start accepts. Automaton has 108536 states and 478071 transitions. Word has length 15 [2021-10-08 15:54:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:54:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 108536 states and 478071 transitions. [2021-10-08 15:54:26,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-08 15:54:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 108536 states and 478071 transitions. [2021-10-08 15:54:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:54:26,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:54:26,647 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:54:26,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-08 15:54:26,847 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 [2021-10-08 15:54:26,848 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:54:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:54:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash 778137972, now seen corresponding path program 1 times [2021-10-08 15:54:26,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:54:26,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896956170] [2021-10-08 15:54:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:54:26,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:54:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:54:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:54:26,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:54:26,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896956170] [2021-10-08 15:54:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896956170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:26,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323885131] [2021-10-08 15:54:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:54:26,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:54:26,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:54:26,907 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) [2021-10-08 15:54:26,926 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 [2021-10-08 15:54:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:54:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 15:54:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:54:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:54:27,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323885131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:27,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:54:27,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-08 15:54:27,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505080220] [2021-10-08 15:54:27,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 15:54:27,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:54:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 15:54:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:54:27,665 INFO L87 Difference]: Start difference. First operand 108536 states and 478071 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-10-08 15:54:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:54:31,885 INFO L93 Difference]: Finished difference Result 187514 states and 797582 transitions. [2021-10-08 15:54:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 15:54:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 15 [2021-10-08 15:54:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:54:33,405 INFO L225 Difference]: With dead ends: 187514 [2021-10-08 15:54:33,405 INFO L226 Difference]: Without dead ends: 186756 [2021-10-08 15:54:33,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2021-10-08 15:54:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186756 states. [2021-10-08 15:54:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186756 to 124954. [2021-10-08 15:54:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124954 states, 124838 states have (on average 4.4247905285249685) internal successors, (552382), 124953 states have internal predecessors, (552382), 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) [2021-10-08 15:54:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124954 states to 124954 states and 552382 transitions. [2021-10-08 15:54:41,876 INFO L78 Accepts]: Start accepts. Automaton has 124954 states and 552382 transitions. Word has length 15 [2021-10-08 15:54:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:54:41,877 INFO L470 AbstractCegarLoop]: Abstraction has 124954 states and 552382 transitions. [2021-10-08 15:54:41,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-10-08 15:54:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 124954 states and 552382 transitions. [2021-10-08 15:54:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:54:41,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:54:41,890 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:54:41,932 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 [2021-10-08 15:54:42,103 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 [2021-10-08 15:54:42,104 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:54:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:54:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash -591741908, now seen corresponding path program 2 times [2021-10-08 15:54:42,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:54:42,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690536281] [2021-10-08 15:54:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:54:42,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:54:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:54:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:54:42,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:54:42,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690536281] [2021-10-08 15:54:42,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690536281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:42,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781295849] [2021-10-08 15:54:42,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:54:42,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:54:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:54:42,224 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) [2021-10-08 15:54:42,229 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 [2021-10-08 15:54:42,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:54:42,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:54:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 15:54:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:54:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:54:42,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781295849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:54:42,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:54:42,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-08 15:54:42,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416610818] [2021-10-08 15:54:42,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 15:54:42,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:54:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 15:54:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:54:42,847 INFO L87 Difference]: Start difference. First operand 124954 states and 552382 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-10-08 15:54:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:54:47,766 INFO L93 Difference]: Finished difference Result 231766 states and 980200 transitions. [2021-10-08 15:54:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 15:54:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 15 [2021-10-08 15:54:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:54:50,500 INFO L225 Difference]: With dead ends: 231766 [2021-10-08 15:54:50,500 INFO L226 Difference]: Without dead ends: 231502 [2021-10-08 15:54:50,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-10-08 15:54:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231502 states. [2021-10-08 15:54:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231502 to 149386. [2021-10-08 15:54:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149386 states, 149270 states have (on average 4.44537415421719) internal successors, (663561), 149385 states have internal predecessors, (663561), 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) [2021-10-08 15:55:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149386 states to 149386 states and 663561 transitions. [2021-10-08 15:55:00,601 INFO L78 Accepts]: Start accepts. Automaton has 149386 states and 663561 transitions. Word has length 15 [2021-10-08 15:55:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:55:00,601 INFO L470 AbstractCegarLoop]: Abstraction has 149386 states and 663561 transitions. [2021-10-08 15:55:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-10-08 15:55:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 149386 states and 663561 transitions. [2021-10-08 15:55:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 15:55:00,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:55:00,613 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:55:00,641 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 [2021-10-08 15:55:00,813 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 [2021-10-08 15:55:00,814 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:55:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:55:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash -999350900, now seen corresponding path program 2 times [2021-10-08 15:55:00,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:55:00,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459408712] [2021-10-08 15:55:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:55:00,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:55:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:55:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 15:55:01,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:55:01,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459408712] [2021-10-08 15:55:01,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459408712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:55:01,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949490507] [2021-10-08 15:55:01,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:55:01,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:55:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:55:01,516 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) [2021-10-08 15:55:01,527 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 [2021-10-08 15:55:01,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:55:01,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:55:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 15:55:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:55:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 15:55:02,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949490507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:55:02,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:55:02,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-10-08 15:55:02,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107201798] [2021-10-08 15:55:02,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 15:55:02,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:55:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 15:55:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-08 15:55:02,142 INFO L87 Difference]: Start difference. First operand 149386 states and 663561 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2021-10-08 15:55:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:55:06,099 INFO L93 Difference]: Finished difference Result 212380 states and 914867 transitions. [2021-10-08 15:55:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-08 15:55:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 16 [2021-10-08 15:55:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:55:08,602 INFO L225 Difference]: With dead ends: 212380 [2021-10-08 15:55:08,603 INFO L226 Difference]: Without dead ends: 212374 [2021-10-08 15:55:08,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:55:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212374 states. [2021-10-08 15:55:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212374 to 153708. [2021-10-08 15:55:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153708 states, 153592 states have (on average 4.4412860044794) internal successors, (682146), 153707 states have internal predecessors, (682146), 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) [2021-10-08 15:55:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153708 states to 153708 states and 682146 transitions. [2021-10-08 15:55:22,160 INFO L78 Accepts]: Start accepts. Automaton has 153708 states and 682146 transitions. Word has length 16 [2021-10-08 15:55:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:55:22,160 INFO L470 AbstractCegarLoop]: Abstraction has 153708 states and 682146 transitions. [2021-10-08 15:55:22,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2021-10-08 15:55:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 153708 states and 682146 transitions. [2021-10-08 15:55:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 15:55:22,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:55:22,171 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:55:22,210 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 [2021-10-08 15:55:22,385 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 [2021-10-08 15:55:22,386 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:55:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:55:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1949385890, now seen corresponding path program 3 times [2021-10-08 15:55:22,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:55:22,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042480139] [2021-10-08 15:55:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:55:22,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:55:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:55:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:55:22,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:55:22,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042480139] [2021-10-08 15:55:22,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042480139] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:55:22,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116230129] [2021-10-08 15:55:22,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 15:55:22,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:55:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:55:22,572 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) [2021-10-08 15:55:22,578 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 [2021-10-08 15:55:23,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 15:55:23,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:55:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 15:55:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:55:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:55:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116230129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:55:23,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:55:23,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-08 15:55:23,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387921443] [2021-10-08 15:55:23,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-08 15:55:23,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:55:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-08 15:55:23,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-10-08 15:55:23,994 INFO L87 Difference]: Start difference. First operand 153708 states and 682146 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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) [2021-10-08 15:55:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:55:36,037 INFO L93 Difference]: Finished difference Result 428626 states and 1831359 transitions. [2021-10-08 15:55:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-08 15:55:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 16 [2021-10-08 15:55:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:55:40,810 INFO L225 Difference]: With dead ends: 428626 [2021-10-08 15:55:40,810 INFO L226 Difference]: Without dead ends: 428332 [2021-10-08 15:55:40,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1591.4ms TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2021-10-08 15:55:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428332 states. [2021-10-08 15:56:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428332 to 248758. [2021-10-08 15:56:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248758 states, 248642 states have (on average 4.478631928636353) internal successors, (1113576), 248757 states have internal predecessors, (1113576), 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) [2021-10-08 15:56:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248758 states to 248758 states and 1113576 transitions. [2021-10-08 15:56:04,858 INFO L78 Accepts]: Start accepts. Automaton has 248758 states and 1113576 transitions. Word has length 16 [2021-10-08 15:56:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:56:04,858 INFO L470 AbstractCegarLoop]: Abstraction has 248758 states and 1113576 transitions. [2021-10-08 15:56:04,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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) [2021-10-08 15:56:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 248758 states and 1113576 transitions. [2021-10-08 15:56:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 15:56:04,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:56:04,876 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:56:04,922 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 [2021-10-08 15:56:05,091 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 [2021-10-08 15:56:05,092 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:56:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:56:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash -12438132, now seen corresponding path program 3 times [2021-10-08 15:56:05,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:56:05,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210787153] [2021-10-08 15:56:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:56:05,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:56:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:56:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:56:05,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:56:05,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210787153] [2021-10-08 15:56:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210787153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:56:05,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962634834] [2021-10-08 15:56:05,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 15:56:05,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:56:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:56:05,231 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) [2021-10-08 15:56:05,240 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 [2021-10-08 15:56:05,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-08 15:56:05,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:56:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 15:56:05,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:56:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:56:06,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962634834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:56:06,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:56:06,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-08 15:56:06,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816608580] [2021-10-08 15:56:06,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-08 15:56:06,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:56:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-08 15:56:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-10-08 15:56:06,496 INFO L87 Difference]: Start difference. First operand 248758 states and 1113576 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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) [2021-10-08 15:56:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:56:24,485 INFO L93 Difference]: Finished difference Result 604330 states and 2618750 transitions. [2021-10-08 15:56:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-08 15:56:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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 17 [2021-10-08 15:56:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:56:32,762 INFO L225 Difference]: With dead ends: 604330 [2021-10-08 15:56:32,762 INFO L226 Difference]: Without dead ends: 604206 [2021-10-08 15:56:32,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2021-10-08 15:56:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604206 states. [2021-10-08 15:57:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604206 to 455336. [2021-10-08 15:57:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455336 states, 455220 states have (on average 4.51611748165722) internal successors, (2055827), 455335 states have internal predecessors, (2055827), 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) [2021-10-08 15:57:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455336 states to 455336 states and 2055827 transitions. [2021-10-08 15:57:20,212 INFO L78 Accepts]: Start accepts. Automaton has 455336 states and 2055827 transitions. Word has length 17 [2021-10-08 15:57:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:57:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 455336 states and 2055827 transitions. [2021-10-08 15:57:20,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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) [2021-10-08 15:57:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 455336 states and 2055827 transitions. [2021-10-08 15:57:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 15:57:20,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:57:20,239 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:57:20,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-08 15:57:20,453 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 [2021-10-08 15:57:20,453 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-08 15:57:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:57:20,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1821204291, now seen corresponding path program 1 times [2021-10-08 15:57:20,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:57:20,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163633887] [2021-10-08 15:57:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:57:20,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:57:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:57:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 15:57:20,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:57:20,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163633887] [2021-10-08 15:57:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163633887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:57:20,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:57:20,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:57:20,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720623378] [2021-10-08 15:57:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:57:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:57:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:57:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:57:20,561 INFO L87 Difference]: Start difference. First operand 455336 states and 2055827 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-10-08 15:57:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:57:37,303 INFO L93 Difference]: Finished difference Result 502252 states and 2257373 transitions. [2021-10-08 15:57:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:57:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 17 [2021-10-08 15:57:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted.