/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/popl20/difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-06 16:20:57,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-06 16:20:57,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-06 16:20:57,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-06 16:20:57,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-06 16:20:57,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-06 16:20:57,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-06 16:20:57,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-06 16:20:57,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-06 16:20:57,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-06 16:20:57,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-06 16:20:57,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-06 16:20:57,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-06 16:20:57,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-06 16:20:57,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-06 16:20:57,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-06 16:20:57,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-06 16:20:57,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-06 16:20:57,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-06 16:20:57,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-06 16:20:57,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-06 16:20:57,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-06 16:20:57,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-06 16:20:57,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-06 16:20:57,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-06 16:20:57,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-06 16:20:57,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-06 16:20:57,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-06 16:20:57,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-06 16:20:57,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-06 16:20:57,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-06 16:20:57,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-06 16:20:57,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-06 16:20:57,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-06 16:20:57,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-06 16:20:57,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-06 16:20:57,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-06 16:20:57,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-06 16:20:57,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-06 16:20:57,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-06 16:20:57,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-06 16:20:57,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-06 16:20:57,321 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-06 16:20:57,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-06 16:20:57,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-06 16:20:57,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-06 16:20:57,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-06 16:20:57,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-06 16:20:57,328 INFO L138 SettingsManager]: * Use SBE=true [2021-10-06 16:20:57,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-06 16:20:57,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-06 16:20:57,329 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-06 16:20:57,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-06 16:20:57,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-06 16:20:57,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-06 16:20:57,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-06 16:20:57,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-06 16:20:57,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-06 16:20:57,331 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-06 16:20:57,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-06 16:20:57,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-06 16:20:57,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-06 16:20:57,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-06 16:20:57,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-06 16:20:57,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-06 16:20:57,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-06 16:20:57,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 16:20:57,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-06 16:20:57,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-06 16:20:57,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-06 16:20:57,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-06 16:20:57,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-06 16:20:57,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-06 16:20:57,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-06 16:20:57,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-06 16:20:57,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-06 16:20:57,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-06 16:20:57,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-06 16:20:57,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-06 16:20:57,849 INFO L275 PluginConnector]: CDTParser initialized [2021-10-06 16:20:57,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/difference-det.wvr.c [2021-10-06 16:20:57,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b35f010d/b287179b919b4855a592e8a2c5b10a51/FLAGd0c5d2481 [2021-10-06 16:20:58,583 INFO L306 CDTParser]: Found 1 translation units. [2021-10-06 16:20:58,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/difference-det.wvr.c [2021-10-06 16:20:58,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b35f010d/b287179b919b4855a592e8a2c5b10a51/FLAGd0c5d2481 [2021-10-06 16:20:58,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b35f010d/b287179b919b4855a592e8a2c5b10a51 [2021-10-06 16:20:58,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-06 16:20:58,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-06 16:20:58,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-06 16:20:58,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-06 16:20:58,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-06 16:20:58,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 04:20:58" (1/1) ... [2021-10-06 16:20:58,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5965cf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:58, skipping insertion in model container [2021-10-06 16:20:58,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 04:20:58" (1/1) ... [2021-10-06 16:20:58,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-06 16:20:58,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 16:20:59,169 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/difference-det.wvr.c[2441,2454] [2021-10-06 16:20:59,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 16:20:59,181 INFO L203 MainTranslator]: Completed pre-run [2021-10-06 16:20:59,211 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/difference-det.wvr.c[2441,2454] [2021-10-06 16:20:59,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 16:20:59,233 INFO L208 MainTranslator]: Completed translation [2021-10-06 16:20:59,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59 WrapperNode [2021-10-06 16:20:59,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-06 16:20:59,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-06 16:20:59,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-06 16:20:59,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-06 16:20:59,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-06 16:20:59,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-06 16:20:59,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-06 16:20:59,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-06 16:20:59,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-06 16:20:59,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-06 16:20:59,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-06 16:20:59,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-06 16:20:59,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (1/1) ... [2021-10-06 16:20:59,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 16:20:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:20:59,454 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) [2021-10-06 16:20:59,476 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 [2021-10-06 16:20:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-06 16:20:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-06 16:20:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-06 16:20:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-06 16:20:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-06 16:20:59,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-06 16:20:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-06 16:20:59,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-06 16:20:59,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-06 16:20:59,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-06 16:20:59,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-06 16:20:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-06 16:20:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-06 16:20:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-06 16:20:59,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-06 16:20:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-06 16:20:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-06 16:20:59,542 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-06 16:21:00,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-06 16:21:00,470 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-06 16:21:00,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 04:21:00 BoogieIcfgContainer [2021-10-06 16:21:00,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-06 16:21:00,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-06 16:21:00,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-06 16:21:00,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-06 16:21:00,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 04:20:58" (1/3) ... [2021-10-06 16:21:00,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d25e683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 04:21:00, skipping insertion in model container [2021-10-06 16:21:00,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 04:20:59" (2/3) ... [2021-10-06 16:21:00,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d25e683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 04:21:00, skipping insertion in model container [2021-10-06 16:21:00,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 04:21:00" (3/3) ... [2021-10-06 16:21:00,490 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.c [2021-10-06 16:21:00,496 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-06 16:21:00,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-06 16:21:00,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-06 16:21:00,497 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-06 16:21:00,568 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,569 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,569 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,571 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,573 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,573 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,575 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,576 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,582 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,582 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,582 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,583 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,583 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,585 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,585 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,585 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,586 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,586 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,586 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,587 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,587 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,588 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,588 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,589 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,589 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,590 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,592 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,593 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,593 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,593 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,594 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,594 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,595 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,595 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,595 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,596 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,596 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,597 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,597 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,598 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,598 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,601 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,601 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,602 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,602 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,602 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,602 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,603 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,603 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,604 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,604 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,604 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,605 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,605 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,605 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,605 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,607 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,608 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,609 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,610 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,614 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,619 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,619 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,619 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,620 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,622 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,622 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,622 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,623 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,623 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,624 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,624 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,624 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,624 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,625 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,625 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,626 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,626 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,626 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,627 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,627 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,627 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,627 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,628 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,628 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,628 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,628 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,628 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,629 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,629 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,629 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,629 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,629 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,630 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,630 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,630 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,630 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,631 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,632 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,632 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,632 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,633 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,633 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,633 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,633 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,634 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,634 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,634 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,634 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,634 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,635 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,635 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,643 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,644 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,644 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,644 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,644 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,647 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,647 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,648 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,650 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,650 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,650 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,651 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,651 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,651 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,651 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,661 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,661 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,662 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,662 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,662 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,662 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,663 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 16:21:00,689 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-06 16:21:00,769 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-06 16:21:00,786 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 [2021-10-06 16:21:00,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2021-10-06 16:21:00,821 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-06 16:21:00,838 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 138 transitions, 308 flow [2021-10-06 16:21:00,844 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 138 transitions, 308 flow [2021-10-06 16:21:00,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 142 places, 138 transitions, 308 flow [2021-10-06 16:21:00,959 INFO L129 PetriNetUnfolder]: 9/134 cut-off events. [2021-10-06 16:21:00,959 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-06 16:21:00,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 134 events. 9/134 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2021-10-06 16:21:00,976 INFO L116 LiptonReduction]: Number of co-enabled transitions 4680 [2021-10-06 16:21:06,487 INFO L131 LiptonReduction]: Checked pairs total: 5934 [2021-10-06 16:21:06,488 INFO L133 LiptonReduction]: Total number of compositions: 123 [2021-10-06 16:21:06,499 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 49 transitions, 130 flow [2021-10-06 16:21:06,834 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-06 16:21:06,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:06,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-06 16:21:06,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash 18493290, now seen corresponding path program 1 times [2021-10-06 16:21:06,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:06,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52970556] [2021-10-06 16:21:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:06,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:07,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:07,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52970556] [2021-10-06 16:21:07,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52970556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:07,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:07,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-06 16:21:07,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528686654] [2021-10-06 16:21:07,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:07,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:07,174 INFO L87 Difference]: Start difference. First operand has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:07,371 INFO L93 Difference]: Finished difference Result 5452 states and 23580 transitions. [2021-10-06 16:21:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:07,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2021-10-06 16:21:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:07,581 INFO L225 Difference]: With dead ends: 5452 [2021-10-06 16:21:07,581 INFO L226 Difference]: Without dead ends: 5444 [2021-10-06 16:21:07,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2021-10-06 16:21:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5172. [2021-10-06 16:21:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5172 states, 4773 states have (on average 4.777498428661219) internal successors, (22803), 5171 states have internal predecessors, (22803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 22803 transitions. [2021-10-06 16:21:08,152 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 22803 transitions. Word has length 4 [2021-10-06 16:21:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:08,154 INFO L470 AbstractCegarLoop]: Abstraction has 5172 states and 22803 transitions. [2021-10-06 16:21:08,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 22803 transitions. [2021-10-06 16:21:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-06 16:21:08,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:08,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-06 16:21:08,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-06 16:21:08,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash 18493387, now seen corresponding path program 1 times [2021-10-06 16:21:08,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:08,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790694312] [2021-10-06 16:21:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:08,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:08,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:08,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790694312] [2021-10-06 16:21:08,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790694312] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:08,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:08,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-06 16:21:08,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795288887] [2021-10-06 16:21:08,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:08,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:08,273 INFO L87 Difference]: Start difference. First operand 5172 states and 22803 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:08,433 INFO L93 Difference]: Finished difference Result 5444 states and 22946 transitions. [2021-10-06 16:21:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:08,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2021-10-06 16:21:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:08,518 INFO L225 Difference]: With dead ends: 5444 [2021-10-06 16:21:08,518 INFO L226 Difference]: Without dead ends: 5444 [2021-10-06 16:21:08,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2021-10-06 16:21:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5172. [2021-10-06 16:21:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5172 states, 4773 states have (on average 4.650953278860255) internal successors, (22199), 5171 states have internal predecessors, (22199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 22199 transitions. [2021-10-06 16:21:08,977 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 22199 transitions. Word has length 4 [2021-10-06 16:21:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:08,978 INFO L470 AbstractCegarLoop]: Abstraction has 5172 states and 22199 transitions. [2021-10-06 16:21:08,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 22199 transitions. [2021-10-06 16:21:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 16:21:08,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:08,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 16:21:08,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-06 16:21:08,980 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash 573295857, now seen corresponding path program 1 times [2021-10-06 16:21:08,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:08,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130473794] [2021-10-06 16:21:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:08,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:09,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:09,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130473794] [2021-10-06 16:21:09,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130473794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:09,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954774668] [2021-10-06 16:21:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:09,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:09,094 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) [2021-10-06 16:21:09,122 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 [2021-10-06 16:21:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:09,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954774668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:09,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 16:21:09,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2021-10-06 16:21:09,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834704908] [2021-10-06 16:21:09,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 16:21:09,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 16:21:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:09,242 INFO L87 Difference]: Start difference. First operand 5172 states and 22199 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2021-10-06 16:21:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:09,453 INFO L93 Difference]: Finished difference Result 6994 states and 30532 transitions. [2021-10-06 16:21:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 16:21:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 [2021-10-06 16:21:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:09,626 INFO L225 Difference]: With dead ends: 6994 [2021-10-06 16:21:09,626 INFO L226 Difference]: Without dead ends: 6994 [2021-10-06 16:21:09,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2021-10-06 16:21:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 4570. [2021-10-06 16:21:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4251 states have (on average 4.60009409550694) internal successors, (19555), 4569 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 19555 transitions. [2021-10-06 16:21:10,025 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 19555 transitions. Word has length 5 [2021-10-06 16:21:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:10,026 INFO L470 AbstractCegarLoop]: Abstraction has 4570 states and 19555 transitions. [2021-10-06 16:21:10,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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) [2021-10-06 16:21:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 19555 transitions. [2021-10-06 16:21:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 16:21:10,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:10,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 16:21:10,069 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 [2021-10-06 16:21:10,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:10,244 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash 573295954, now seen corresponding path program 1 times [2021-10-06 16:21:10,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:10,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424558657] [2021-10-06 16:21:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:10,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:10,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:10,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424558657] [2021-10-06 16:21:10,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424558657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:10,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:10,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-06 16:21:10,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120771767] [2021-10-06 16:21:10,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:10,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:10,285 INFO L87 Difference]: Start difference. First operand 4570 states and 19555 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) [2021-10-06 16:21:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:10,351 INFO L93 Difference]: Finished difference Result 3968 states and 16911 transitions. [2021-10-06 16:21:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:10,351 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 [2021-10-06 16:21:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:10,385 INFO L225 Difference]: With dead ends: 3968 [2021-10-06 16:21:10,386 INFO L226 Difference]: Without dead ends: 3968 [2021-10-06 16:21:10,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-10-06 16:21:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3968. [2021-10-06 16:21:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3729 states have (on average 4.534995977473853) internal successors, (16911), 3967 states have internal predecessors, (16911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16911 transitions. [2021-10-06 16:21:10,689 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16911 transitions. Word has length 5 [2021-10-06 16:21:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:10,689 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 16911 transitions. [2021-10-06 16:21:10,690 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) [2021-10-06 16:21:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16911 transitions. [2021-10-06 16:21:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 16:21:10,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:10,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 16:21:10,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-06 16:21:10,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 573295938, now seen corresponding path program 1 times [2021-10-06 16:21:10,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:10,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432352685] [2021-10-06 16:21:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:10,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:10,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:10,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432352685] [2021-10-06 16:21:10,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432352685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:10,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958352372] [2021-10-06 16:21:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:10,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:10,795 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) [2021-10-06 16:21:10,819 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 [2021-10-06 16:21:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:10,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958352372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:10,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:10,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-06 16:21:10,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973934006] [2021-10-06 16:21:10,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 16:21:10,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 16:21:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:10,897 INFO L87 Difference]: Start difference. First operand 3968 states and 16911 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-10-06 16:21:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:11,034 INFO L93 Difference]: Finished difference Result 6638 states and 27855 transitions. [2021-10-06 16:21:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 16:21:11,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 5 [2021-10-06 16:21:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:11,088 INFO L225 Difference]: With dead ends: 6638 [2021-10-06 16:21:11,088 INFO L226 Difference]: Without dead ends: 6638 [2021-10-06 16:21:11,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2021-10-06 16:21:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 4570. [2021-10-06 16:21:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4331 states have (on average 4.792657584853383) internal successors, (20757), 4569 states have internal predecessors, (20757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 20757 transitions. [2021-10-06 16:21:11,420 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 20757 transitions. Word has length 5 [2021-10-06 16:21:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:11,420 INFO L470 AbstractCegarLoop]: Abstraction has 4570 states and 20757 transitions. [2021-10-06 16:21:11,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-10-06 16:21:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 20757 transitions. [2021-10-06 16:21:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 16:21:11,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:11,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 16:21:11,465 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 [2021-10-06 16:21:11,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:11,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash 573295859, now seen corresponding path program 1 times [2021-10-06 16:21:11,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:11,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590135304] [2021-10-06 16:21:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:11,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:11,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:11,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590135304] [2021-10-06 16:21:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590135304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:11,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179898326] [2021-10-06 16:21:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:11,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:11,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:11,671 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) [2021-10-06 16:21:11,680 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 [2021-10-06 16:21:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:11,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179898326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:11,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:11,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-06 16:21:11,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192826881] [2021-10-06 16:21:11,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 16:21:11,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 16:21:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:11,761 INFO L87 Difference]: Start difference. First operand 4570 states and 20757 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-10-06 16:21:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:12,021 INFO L93 Difference]: Finished difference Result 8104 states and 33865 transitions. [2021-10-06 16:21:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 16:21:12,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 5 [2021-10-06 16:21:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:12,096 INFO L225 Difference]: With dead ends: 8104 [2021-10-06 16:21:12,096 INFO L226 Difference]: Without dead ends: 8100 [2021-10-06 16:21:12,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-10-06 16:21:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 6040. [2021-10-06 16:21:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 5801 states have (on average 4.875538700224099) internal successors, (28283), 6039 states have internal predecessors, (28283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 28283 transitions. [2021-10-06 16:21:12,651 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 28283 transitions. Word has length 5 [2021-10-06 16:21:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:12,651 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 28283 transitions. [2021-10-06 16:21:12,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-10-06 16:21:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 28283 transitions. [2021-10-06 16:21:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-06 16:21:12,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:12,653 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-06 16:21:12,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-06 16:21:12,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:12,868 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash 592306331, now seen corresponding path program 2 times [2021-10-06 16:21:12,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:12,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951654327] [2021-10-06 16:21:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:12,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:12,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:12,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951654327] [2021-10-06 16:21:12,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951654327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:12,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824738550] [2021-10-06 16:21:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:21:12,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:12,913 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) [2021-10-06 16:21:12,936 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 [2021-10-06 16:21:12,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-06 16:21:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-06 16:21:13,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824738550] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:13,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 16:21:13,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2021-10-06 16:21:13,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308469395] [2021-10-06 16:21:13,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:13,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:13,012 INFO L87 Difference]: Start difference. First operand 6040 states and 28283 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-10-06 16:21:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:13,079 INFO L93 Difference]: Finished difference Result 4504 states and 20487 transitions. [2021-10-06 16:21:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:13,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 6 [2021-10-06 16:21:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:13,121 INFO L225 Difference]: With dead ends: 4504 [2021-10-06 16:21:13,122 INFO L226 Difference]: Without dead ends: 4504 [2021-10-06 16:21:13,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-10-06 16:21:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3816. [2021-10-06 16:21:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3689 states have (on average 4.5966386554621845) internal successors, (16957), 3815 states have internal predecessors, (16957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 16957 transitions. [2021-10-06 16:21:13,444 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 16957 transitions. Word has length 6 [2021-10-06 16:21:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:13,445 INFO L470 AbstractCegarLoop]: Abstraction has 3816 states and 16957 transitions. [2021-10-06 16:21:13,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-10-06 16:21:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 16957 transitions. [2021-10-06 16:21:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-06 16:21:13,450 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:13,451 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-06 16:21:13,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-06 16:21:13,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:13,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:13,667 INFO L82 PathProgramCache]: Analyzing trace with hash 592306252, now seen corresponding path program 2 times [2021-10-06 16:21:13,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:13,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878172433] [2021-10-06 16:21:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:13,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:13,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:13,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878172433] [2021-10-06 16:21:13,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878172433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:13,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119365418] [2021-10-06 16:21:13,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:21:13,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:13,724 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) [2021-10-06 16:21:13,734 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 [2021-10-06 16:21:13,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:21:13,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:13,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-06 16:21:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:13,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119365418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:13,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:13,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-06 16:21:13,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671925510] [2021-10-06 16:21:13,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-06 16:21:13,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-06 16:21:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:13,833 INFO L87 Difference]: Start difference. First operand 3816 states and 16957 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-06 16:21:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:13,967 INFO L93 Difference]: Finished difference Result 7220 states and 30444 transitions. [2021-10-06 16:21:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 16:21:13,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 6 [2021-10-06 16:21:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:14,036 INFO L225 Difference]: With dead ends: 7220 [2021-10-06 16:21:14,036 INFO L226 Difference]: Without dead ends: 7216 [2021-10-06 16:21:14,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2021-10-06 16:21:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 4566. [2021-10-06 16:21:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4439 states have (on average 4.71119621536382) internal successors, (20913), 4565 states have internal predecessors, (20913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 20913 transitions. [2021-10-06 16:21:14,438 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 20913 transitions. Word has length 6 [2021-10-06 16:21:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:14,439 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 20913 transitions. [2021-10-06 16:21:14,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-06 16:21:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 20913 transitions. [2021-10-06 16:21:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 16:21:14,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:14,442 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2021-10-06 16:21:14,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-06 16:21:14,656 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 [2021-10-06 16:21:14,657 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:14,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1181628435, now seen corresponding path program 3 times [2021-10-06 16:21:14,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:14,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082796396] [2021-10-06 16:21:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:14,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:14,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:14,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082796396] [2021-10-06 16:21:14,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082796396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:14,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720464229] [2021-10-06 16:21:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:21:14,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:14,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:14,706 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) [2021-10-06 16:21:14,735 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 [2021-10-06 16:21:14,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 16:21:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 16:21:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:14,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720464229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:14,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:14,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-06 16:21:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538162336] [2021-10-06 16:21:14,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 16:21:14,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 16:21:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 16:21:14,823 INFO L87 Difference]: Start difference. First operand 4566 states and 20913 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:14,978 INFO L93 Difference]: Finished difference Result 9022 states and 38789 transitions. [2021-10-06 16:21:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-06 16:21:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 7 [2021-10-06 16:21:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:15,056 INFO L225 Difference]: With dead ends: 9022 [2021-10-06 16:21:15,057 INFO L226 Difference]: Without dead ends: 9018 [2021-10-06 16:21:15,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 16:21:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9018 states. [2021-10-06 16:21:15,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9018 to 5316. [2021-10-06 16:21:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5189 states have (on average 4.79263827327038) internal successors, (24869), 5315 states have internal predecessors, (24869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 24869 transitions. [2021-10-06 16:21:15,645 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 24869 transitions. Word has length 7 [2021-10-06 16:21:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:15,645 INFO L470 AbstractCegarLoop]: Abstraction has 5316 states and 24869 transitions. [2021-10-06 16:21:15,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 24869 transitions. [2021-10-06 16:21:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-06 16:21:15,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:15,650 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:15,694 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 [2021-10-06 16:21:15,864 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 [2021-10-06 16:21:15,865 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1561808048, now seen corresponding path program 1 times [2021-10-06 16:21:15,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:15,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925664664] [2021-10-06 16:21:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:15,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:15,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:15,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925664664] [2021-10-06 16:21:15,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925664664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:15,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:15,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-06 16:21:15,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787712202] [2021-10-06 16:21:15,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:15,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:15,901 INFO L87 Difference]: Start difference. First operand 5316 states and 24869 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-10-06 16:21:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:15,983 INFO L93 Difference]: Finished difference Result 5886 states and 27577 transitions. [2021-10-06 16:21:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 8 [2021-10-06 16:21:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:16,034 INFO L225 Difference]: With dead ends: 5886 [2021-10-06 16:21:16,035 INFO L226 Difference]: Without dead ends: 5848 [2021-10-06 16:21:16,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2021-10-06 16:21:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5734. [2021-10-06 16:21:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5734 states, 5607 states have (on average 4.829855537720706) internal successors, (27081), 5733 states have internal predecessors, (27081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5734 states to 5734 states and 27081 transitions. [2021-10-06 16:21:16,503 INFO L78 Accepts]: Start accepts. Automaton has 5734 states and 27081 transitions. Word has length 8 [2021-10-06 16:21:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:16,504 INFO L470 AbstractCegarLoop]: Abstraction has 5734 states and 27081 transitions. [2021-10-06 16:21:16,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-10-06 16:21:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5734 states and 27081 transitions. [2021-10-06 16:21:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-06 16:21:16,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:16,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:16,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-06 16:21:16,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1561807999, now seen corresponding path program 1 times [2021-10-06 16:21:16,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:16,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922279901] [2021-10-06 16:21:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:16,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:16,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:16,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922279901] [2021-10-06 16:21:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922279901] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:16,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:16,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-06 16:21:16,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915289996] [2021-10-06 16:21:16,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:16,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:16,535 INFO L87 Difference]: Start difference. First operand 5734 states and 27081 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-10-06 16:21:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:16,615 INFO L93 Difference]: Finished difference Result 5848 states and 26901 transitions. [2021-10-06 16:21:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 8 [2021-10-06 16:21:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:16,662 INFO L225 Difference]: With dead ends: 5848 [2021-10-06 16:21:16,662 INFO L226 Difference]: Without dead ends: 5848 [2021-10-06 16:21:16,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2021-10-06 16:21:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5734. [2021-10-06 16:21:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5734 states, 5607 states have (on average 4.743891564116283) internal successors, (26599), 5733 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5734 states to 5734 states and 26599 transitions. [2021-10-06 16:21:17,054 INFO L78 Accepts]: Start accepts. Automaton has 5734 states and 26599 transitions. Word has length 8 [2021-10-06 16:21:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:17,055 INFO L470 AbstractCegarLoop]: Abstraction has 5734 states and 26599 transitions. [2021-10-06 16:21:17,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-10-06 16:21:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5734 states and 26599 transitions. [2021-10-06 16:21:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-06 16:21:17,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:17,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:17,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-06 16:21:17,057 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1566449654, now seen corresponding path program 1 times [2021-10-06 16:21:17,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:17,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250493294] [2021-10-06 16:21:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:17,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:17,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:17,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250493294] [2021-10-06 16:21:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250493294] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:17,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:17,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-06 16:21:17,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945569880] [2021-10-06 16:21:17,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:17,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:17,088 INFO L87 Difference]: Start difference. First operand 5734 states and 26599 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-10-06 16:21:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:17,197 INFO L93 Difference]: Finished difference Result 8292 states and 38127 transitions. [2021-10-06 16:21:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:17,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 8 [2021-10-06 16:21:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:17,275 INFO L225 Difference]: With dead ends: 8292 [2021-10-06 16:21:17,276 INFO L226 Difference]: Without dead ends: 8264 [2021-10-06 16:21:17,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2021-10-06 16:21:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 6950. [2021-10-06 16:21:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6950 states, 6823 states have (on average 4.88333577605159) internal successors, (33319), 6949 states have internal predecessors, (33319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6950 states to 6950 states and 33319 transitions. [2021-10-06 16:21:17,868 INFO L78 Accepts]: Start accepts. Automaton has 6950 states and 33319 transitions. Word has length 8 [2021-10-06 16:21:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 6950 states and 33319 transitions. [2021-10-06 16:21:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-10-06 16:21:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6950 states and 33319 transitions. [2021-10-06 16:21:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-06 16:21:17,870 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:17,870 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-10-06 16:21:17,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-06 16:21:17,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:17,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2024220372, now seen corresponding path program 4 times [2021-10-06 16:21:17,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:17,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557724790] [2021-10-06 16:21:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:17,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:17,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:17,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557724790] [2021-10-06 16:21:17,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557724790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:17,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291933740] [2021-10-06 16:21:17,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:21:17,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:17,923 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) [2021-10-06 16:21:17,944 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 [2021-10-06 16:21:17,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:21:17,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 16:21:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291933740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:18,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-06 16:21:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100741164] [2021-10-06 16:21:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 16:21:18,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 16:21:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-06 16:21:18,026 INFO L87 Difference]: Start difference. First operand 6950 states and 33319 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2021-10-06 16:21:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:18,488 INFO L93 Difference]: Finished difference Result 13092 states and 58284 transitions. [2021-10-06 16:21:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-06 16:21:18,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 8 [2021-10-06 16:21:18,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:18,596 INFO L225 Difference]: With dead ends: 13092 [2021-10-06 16:21:18,596 INFO L226 Difference]: Without dead ends: 13078 [2021-10-06 16:21:18,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-06 16:21:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-10-06 16:21:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 8028. [2021-10-06 16:21:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8028 states, 7901 states have (on average 4.9288697633210985) internal successors, (38943), 8027 states have internal predecessors, (38943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8028 states to 8028 states and 38943 transitions. [2021-10-06 16:21:19,367 INFO L78 Accepts]: Start accepts. Automaton has 8028 states and 38943 transitions. Word has length 8 [2021-10-06 16:21:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:19,367 INFO L470 AbstractCegarLoop]: Abstraction has 8028 states and 38943 transitions. [2021-10-06 16:21:19,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2021-10-06 16:21:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8028 states and 38943 transitions. [2021-10-06 16:21:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 16:21:19,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:19,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:19,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-06 16:21:19,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-06 16:21:19,585 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1171406953, now seen corresponding path program 1 times [2021-10-06 16:21:19,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:19,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925950119] [2021-10-06 16:21:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:19,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:19,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:19,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925950119] [2021-10-06 16:21:19,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925950119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:19,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389296023] [2021-10-06 16:21:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:19,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:19,619 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) [2021-10-06 16:21:19,626 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 [2021-10-06 16:21:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:19,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389296023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:19,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:19,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-06 16:21:19,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036696899] [2021-10-06 16:21:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 16:21:19,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 16:21:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:19,717 INFO L87 Difference]: Start difference. First operand 8028 states and 38943 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:19,955 INFO L93 Difference]: Finished difference Result 12950 states and 62279 transitions. [2021-10-06 16:21:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 16:21:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2021-10-06 16:21:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:20,104 INFO L225 Difference]: With dead ends: 12950 [2021-10-06 16:21:20,105 INFO L226 Difference]: Without dead ends: 12926 [2021-10-06 16:21:20,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-10-06 16:21:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 10644. [2021-10-06 16:21:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10644 states, 10517 states have (on average 5.255205857183608) internal successors, (55269), 10643 states have internal predecessors, (55269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10644 states to 10644 states and 55269 transitions. [2021-10-06 16:21:21,223 INFO L78 Accepts]: Start accepts. Automaton has 10644 states and 55269 transitions. Word has length 9 [2021-10-06 16:21:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:21,224 INFO L470 AbstractCegarLoop]: Abstraction has 10644 states and 55269 transitions. [2021-10-06 16:21:21,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10644 states and 55269 transitions. [2021-10-06 16:21:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 16:21:21,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:21,228 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:21,305 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 [2021-10-06 16:21:21,442 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,SelfDestructingSolverStorable13 [2021-10-06 16:21:21,443 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1171406952, now seen corresponding path program 1 times [2021-10-06 16:21:21,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:21,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445820234] [2021-10-06 16:21:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:21,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:21,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:21,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445820234] [2021-10-06 16:21:21,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445820234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:21,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844224085] [2021-10-06 16:21:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:21,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:21,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:21,502 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) [2021-10-06 16:21:21,523 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 [2021-10-06 16:21:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:21,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:21,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844224085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:21,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 16:21:21,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2021-10-06 16:21:21,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399727393] [2021-10-06 16:21:21,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 16:21:21,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 16:21:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:21,619 INFO L87 Difference]: Start difference. First operand 10644 states and 55269 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-10-06 16:21:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:21,842 INFO L93 Difference]: Finished difference Result 12292 states and 63904 transitions. [2021-10-06 16:21:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 16:21:21,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 9 [2021-10-06 16:21:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:21,946 INFO L225 Difference]: With dead ends: 12292 [2021-10-06 16:21:21,947 INFO L226 Difference]: Without dead ends: 12292 [2021-10-06 16:21:21,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12292 states. [2021-10-06 16:21:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12292 to 9428. [2021-10-06 16:21:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9333 states have (on average 5.244294439087111) internal successors, (48945), 9427 states have internal predecessors, (48945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 48945 transitions. [2021-10-06 16:21:22,769 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 48945 transitions. Word has length 9 [2021-10-06 16:21:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:22,769 INFO L470 AbstractCegarLoop]: Abstraction has 9428 states and 48945 transitions. [2021-10-06 16:21:22,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-10-06 16:21:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 48945 transitions. [2021-10-06 16:21:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 16:21:22,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:22,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:22,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-06 16:21:22,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:22,985 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1171406904, now seen corresponding path program 1 times [2021-10-06 16:21:22,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:22,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863714770] [2021-10-06 16:21:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:22,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:23,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:23,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863714770] [2021-10-06 16:21:23,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863714770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:23,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368479430] [2021-10-06 16:21:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:23,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:23,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:23,016 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) [2021-10-06 16:21:23,021 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 [2021-10-06 16:21:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:23,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368479430] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:23,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 16:21:23,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-10-06 16:21:23,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516424740] [2021-10-06 16:21:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 16:21:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 16:21:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:23,113 INFO L87 Difference]: Start difference. First operand 9428 states and 48945 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-10-06 16:21:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:23,215 INFO L93 Difference]: Finished difference Result 8168 states and 40241 transitions. [2021-10-06 16:21:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 16:21:23,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 9 [2021-10-06 16:21:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:23,255 INFO L225 Difference]: With dead ends: 8168 [2021-10-06 16:21:23,256 INFO L226 Difference]: Without dead ends: 8168 [2021-10-06 16:21:23,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8168 states. [2021-10-06 16:21:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8168 to 7492. [2021-10-06 16:21:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7492 states, 7429 states have (on average 5.017229775205276) internal successors, (37273), 7491 states have internal predecessors, (37273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7492 states to 7492 states and 37273 transitions. [2021-10-06 16:21:23,833 INFO L78 Accepts]: Start accepts. Automaton has 7492 states and 37273 transitions. Word has length 9 [2021-10-06 16:21:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:23,834 INFO L470 AbstractCegarLoop]: Abstraction has 7492 states and 37273 transitions. [2021-10-06 16:21:23,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-10-06 16:21:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7492 states and 37273 transitions. [2021-10-06 16:21:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 16:21:23,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:23,835 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2021-10-06 16:21:23,861 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 [2021-10-06 16:21:24,042 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,SelfDestructingSolverStorable15 [2021-10-06 16:21:24,043 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:24,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1673681715, now seen corresponding path program 5 times [2021-10-06 16:21:24,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:24,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560471552] [2021-10-06 16:21:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:24,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:24,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:24,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560471552] [2021-10-06 16:21:24,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560471552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:24,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571082094] [2021-10-06 16:21:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:21:24,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:24,119 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) [2021-10-06 16:21:24,131 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 [2021-10-06 16:21:24,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-06 16:21:24,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 16:21:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:24,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571082094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:24,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:24,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-06 16:21:24,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035821011] [2021-10-06 16:21:24,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-06 16:21:24,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-06 16:21:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-06 16:21:24,241 INFO L87 Difference]: Start difference. First operand 7492 states and 37273 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:24,467 INFO L93 Difference]: Finished difference Result 14276 states and 65749 transitions. [2021-10-06 16:21:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 16:21:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-10-06 16:21:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:24,573 INFO L225 Difference]: With dead ends: 14276 [2021-10-06 16:21:24,574 INFO L226 Difference]: Without dead ends: 14262 [2021-10-06 16:21:24,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-06 16:21:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14262 states. [2021-10-06 16:21:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14262 to 8498. [2021-10-06 16:21:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8498 states, 8435 states have (on average 5.056787196206283) internal successors, (42654), 8497 states have internal predecessors, (42654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8498 states to 8498 states and 42654 transitions. [2021-10-06 16:21:25,245 INFO L78 Accepts]: Start accepts. Automaton has 8498 states and 42654 transitions. Word has length 9 [2021-10-06 16:21:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:25,246 INFO L470 AbstractCegarLoop]: Abstraction has 8498 states and 42654 transitions. [2021-10-06 16:21:25,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8498 states and 42654 transitions. [2021-10-06 16:21:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-06 16:21:25,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:25,247 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:25,294 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 [2021-10-06 16:21:25,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:25,461 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1953874896, now seen corresponding path program 2 times [2021-10-06 16:21:25,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:25,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603801899] [2021-10-06 16:21:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:25,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:25,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:25,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603801899] [2021-10-06 16:21:25,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603801899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:25,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322786851] [2021-10-06 16:21:25,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:21:25,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:25,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:25,496 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) [2021-10-06 16:21:25,514 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 [2021-10-06 16:21:25,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:21:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-06 16:21:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:25,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322786851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:25,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:25,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-06 16:21:25,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590657179] [2021-10-06 16:21:25,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-06 16:21:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-06 16:21:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:25,616 INFO L87 Difference]: Start difference. First operand 8498 states and 42654 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-10-06 16:21:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:26,059 INFO L93 Difference]: Finished difference Result 14064 states and 69123 transitions. [2021-10-06 16:21:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 16:21:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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 10 [2021-10-06 16:21:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:26,186 INFO L225 Difference]: With dead ends: 14064 [2021-10-06 16:21:26,186 INFO L226 Difference]: Without dead ends: 14040 [2021-10-06 16:21:26,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14040 states. [2021-10-06 16:21:26,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14040 to 10238. [2021-10-06 16:21:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10238 states, 10175 states have (on average 5.1548894348894345) internal successors, (52451), 10237 states have internal predecessors, (52451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10238 states to 10238 states and 52451 transitions. [2021-10-06 16:21:26,654 INFO L78 Accepts]: Start accepts. Automaton has 10238 states and 52451 transitions. Word has length 10 [2021-10-06 16:21:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:26,654 INFO L470 AbstractCegarLoop]: Abstraction has 10238 states and 52451 transitions. [2021-10-06 16:21:26,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-10-06 16:21:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 10238 states and 52451 transitions. [2021-10-06 16:21:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-06 16:21:26,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:26,656 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:26,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-06 16:21:26,856 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,SelfDestructingSolverStorable17 [2021-10-06 16:21:26,857 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2119516331, now seen corresponding path program 1 times [2021-10-06 16:21:26,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:26,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966780728] [2021-10-06 16:21:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:26,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 16:21:26,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:26,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966780728] [2021-10-06 16:21:26,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966780728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:26,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391596843] [2021-10-06 16:21:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:26,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:26,894 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) [2021-10-06 16:21:26,913 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 [2021-10-06 16:21:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 16:21:26,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391596843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:26,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:26,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-06 16:21:26,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764388224] [2021-10-06 16:21:27,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 16:21:27,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 16:21:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:27,001 INFO L87 Difference]: Start difference. First operand 10238 states and 52451 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:27,435 INFO L93 Difference]: Finished difference Result 15622 states and 78721 transitions. [2021-10-06 16:21:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 16:21:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-10-06 16:21:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:27,544 INFO L225 Difference]: With dead ends: 15622 [2021-10-06 16:21:27,544 INFO L226 Difference]: Without dead ends: 15622 [2021-10-06 16:21:27,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15622 states. [2021-10-06 16:21:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15622 to 12226. [2021-10-06 16:21:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12226 states, 12163 states have (on average 5.390857518704267) internal successors, (65569), 12225 states have internal predecessors, (65569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12226 states to 12226 states and 65569 transitions. [2021-10-06 16:21:28,228 INFO L78 Accepts]: Start accepts. Automaton has 12226 states and 65569 transitions. Word has length 10 [2021-10-06 16:21:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:28,228 INFO L470 AbstractCegarLoop]: Abstraction has 12226 states and 65569 transitions. [2021-10-06 16:21:28,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 12226 states and 65569 transitions. [2021-10-06 16:21:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-06 16:21:28,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:28,230 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:28,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-06 16:21:28,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:28,435 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2119516310, now seen corresponding path program 1 times [2021-10-06 16:21:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:28,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934578875] [2021-10-06 16:21:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:28,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 16:21:28,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:28,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934578875] [2021-10-06 16:21:28,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934578875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:28,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792877554] [2021-10-06 16:21:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:28,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:28,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:28,469 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) [2021-10-06 16:21:28,478 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 [2021-10-06 16:21:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 16:21:28,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792877554] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:28,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 16:21:28,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-10-06 16:21:28,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800231825] [2021-10-06 16:21:28,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 16:21:28,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 16:21:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:28,568 INFO L87 Difference]: Start difference. First operand 12226 states and 65569 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-10-06 16:21:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:28,700 INFO L93 Difference]: Finished difference Result 12886 states and 64051 transitions. [2021-10-06 16:21:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 16:21:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 [2021-10-06 16:21:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:28,766 INFO L225 Difference]: With dead ends: 12886 [2021-10-06 16:21:28,766 INFO L226 Difference]: Without dead ends: 12844 [2021-10-06 16:21:28,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-06 16:21:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-10-06 16:21:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 10970. [2021-10-06 16:21:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10923 states have (on average 5.163508193719674) internal successors, (56401), 10969 states have internal predecessors, (56401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 56401 transitions. [2021-10-06 16:21:29,326 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 56401 transitions. Word has length 10 [2021-10-06 16:21:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:29,326 INFO L470 AbstractCegarLoop]: Abstraction has 10970 states and 56401 transitions. [2021-10-06 16:21:29,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-10-06 16:21:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 56401 transitions. [2021-10-06 16:21:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-06 16:21:29,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:29,328 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2021-10-06 16:21:29,356 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 [2021-10-06 16:21:29,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:29,536 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash 344529420, now seen corresponding path program 6 times [2021-10-06 16:21:29,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:29,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852208617] [2021-10-06 16:21:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:29,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:29,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852208617] [2021-10-06 16:21:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852208617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:29,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751685863] [2021-10-06 16:21:29,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:21:29,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:29,592 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) [2021-10-06 16:21:29,605 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 [2021-10-06 16:21:29,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-06 16:21:29,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 16:21:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:29,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751685863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:29,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:29,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-06 16:21:29,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673267140] [2021-10-06 16:21:29,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 16:21:29,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:29,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 16:21:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-06 16:21:29,738 INFO L87 Difference]: Start difference. First operand 10970 states and 56401 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:30,052 INFO L93 Difference]: Finished difference Result 18948 states and 91334 transitions. [2021-10-06 16:21:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 16:21:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2021-10-06 16:21:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:30,437 INFO L225 Difference]: With dead ends: 18948 [2021-10-06 16:21:30,438 INFO L226 Difference]: Without dead ends: 18934 [2021-10-06 16:21:30,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-06 16:21:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18934 states. [2021-10-06 16:21:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18934 to 12370. [2021-10-06 16:21:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12370 states, 12323 states have (on average 5.180150937271768) internal successors, (63835), 12369 states have internal predecessors, (63835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12370 states to 12370 states and 63835 transitions. [2021-10-06 16:21:31,029 INFO L78 Accepts]: Start accepts. Automaton has 12370 states and 63835 transitions. Word has length 10 [2021-10-06 16:21:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:31,029 INFO L470 AbstractCegarLoop]: Abstraction has 12370 states and 63835 transitions. [2021-10-06 16:21:31,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 12370 states and 63835 transitions. [2021-10-06 16:21:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-06 16:21:31,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:31,031 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:31,055 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 [2021-10-06 16:21:31,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:31,239 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash -440577353, now seen corresponding path program 3 times [2021-10-06 16:21:31,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:31,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333472946] [2021-10-06 16:21:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:31,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:31,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:31,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333472946] [2021-10-06 16:21:31,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333472946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:31,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852400893] [2021-10-06 16:21:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:21:31,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:31,283 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) [2021-10-06 16:21:31,290 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 [2021-10-06 16:21:31,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 16:21:31,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 16:21:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:31,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852400893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:31,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:31,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-06 16:21:31,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229369645] [2021-10-06 16:21:31,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 16:21:31,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 16:21:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 16:21:31,419 INFO L87 Difference]: Start difference. First operand 12370 states and 63835 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:32,037 INFO L93 Difference]: Finished difference Result 21072 states and 105931 transitions. [2021-10-06 16:21:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-06 16:21:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-06 16:21:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:32,227 INFO L225 Difference]: With dead ends: 21072 [2021-10-06 16:21:32,227 INFO L226 Difference]: Without dead ends: 21040 [2021-10-06 16:21:32,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 16:21:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21040 states. [2021-10-06 16:21:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21040 to 14474. [2021-10-06 16:21:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14474 states, 14427 states have (on average 5.252235391973383) internal successors, (75774), 14473 states have internal predecessors, (75774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14474 states to 14474 states and 75774 transitions. [2021-10-06 16:21:33,020 INFO L78 Accepts]: Start accepts. Automaton has 14474 states and 75774 transitions. Word has length 11 [2021-10-06 16:21:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:33,021 INFO L470 AbstractCegarLoop]: Abstraction has 14474 states and 75774 transitions. [2021-10-06 16:21:33,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14474 states and 75774 transitions. [2021-10-06 16:21:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-06 16:21:33,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:33,022 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2021-10-06 16:21:33,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-06 16:21:33,223 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,SelfDestructingSolverStorable21 [2021-10-06 16:21:33,224 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2090481235, now seen corresponding path program 7 times [2021-10-06 16:21:33,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:33,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967327626] [2021-10-06 16:21:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:33,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:33,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:33,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967327626] [2021-10-06 16:21:33,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967327626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:33,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282881887] [2021-10-06 16:21:33,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:21:33,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:33,291 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) [2021-10-06 16:21:33,327 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 [2021-10-06 16:21:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:33,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 16:21:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282881887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:33,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:33,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-06 16:21:33,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687038389] [2021-10-06 16:21:33,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 16:21:33,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 16:21:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-06 16:21:33,433 INFO L87 Difference]: Start difference. First operand 14474 states and 75774 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2021-10-06 16:21:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:34,101 INFO L93 Difference]: Finished difference Result 24966 states and 122382 transitions. [2021-10-06 16:21:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 16:21:34,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 11 [2021-10-06 16:21:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:34,326 INFO L225 Difference]: With dead ends: 24966 [2021-10-06 16:21:34,326 INFO L226 Difference]: Without dead ends: 24952 [2021-10-06 16:21:34,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-06 16:21:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24952 states. [2021-10-06 16:21:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24952 to 16110. [2021-10-06 16:21:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16110 states, 16063 states have (on average 5.266139575421777) internal successors, (84590), 16109 states have internal predecessors, (84590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16110 states to 16110 states and 84590 transitions. [2021-10-06 16:21:35,302 INFO L78 Accepts]: Start accepts. Automaton has 16110 states and 84590 transitions. Word has length 11 [2021-10-06 16:21:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:35,303 INFO L470 AbstractCegarLoop]: Abstraction has 16110 states and 84590 transitions. [2021-10-06 16:21:35,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2021-10-06 16:21:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 16110 states and 84590 transitions. [2021-10-06 16:21:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-06 16:21:35,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:35,306 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:35,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-06 16:21:35,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:35,513 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash -772993776, now seen corresponding path program 4 times [2021-10-06 16:21:35,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:35,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214345570] [2021-10-06 16:21:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:35,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:35,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:35,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214345570] [2021-10-06 16:21:35,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214345570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:35,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399169485] [2021-10-06 16:21:35,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:21:35,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:35,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:35,568 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) [2021-10-06 16:21:35,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-06 16:21:35,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:21:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:35,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 16:21:35,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:35,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399169485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:35,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:35,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-06 16:21:35,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128624533] [2021-10-06 16:21:35,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 16:21:35,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 16:21:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-06 16:21:35,724 INFO L87 Difference]: Start difference. First operand 16110 states and 84590 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-10-06 16:21:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:36,199 INFO L93 Difference]: Finished difference Result 27988 states and 142615 transitions. [2021-10-06 16:21:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-06 16:21:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 12 [2021-10-06 16:21:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:36,803 INFO L225 Difference]: With dead ends: 27988 [2021-10-06 16:21:36,804 INFO L226 Difference]: Without dead ends: 27956 [2021-10-06 16:21:36,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-06 16:21:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27956 states. [2021-10-06 16:21:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27956 to 18450. [2021-10-06 16:21:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18450 states, 18403 states have (on average 5.320382546323969) internal successors, (97911), 18449 states have internal predecessors, (97911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18450 states to 18450 states and 97911 transitions. [2021-10-06 16:21:37,869 INFO L78 Accepts]: Start accepts. Automaton has 18450 states and 97911 transitions. Word has length 12 [2021-10-06 16:21:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:37,869 INFO L470 AbstractCegarLoop]: Abstraction has 18450 states and 97911 transitions. [2021-10-06 16:21:37,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-10-06 16:21:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18450 states and 97911 transitions. [2021-10-06 16:21:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-06 16:21:37,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:37,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:37,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-06 16:21:38,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:38,073 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -773413320, now seen corresponding path program 1 times [2021-10-06 16:21:38,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:38,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193917866] [2021-10-06 16:21:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:38,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:38,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:38,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193917866] [2021-10-06 16:21:38,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193917866] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:38,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:38,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-06 16:21:38,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825306276] [2021-10-06 16:21:38,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:38,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:38,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:38,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:38,099 INFO L87 Difference]: Start difference. First operand 18450 states and 97911 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-10-06 16:21:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:38,363 INFO L93 Difference]: Finished difference Result 25026 states and 133035 transitions. [2021-10-06 16:21:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:38,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 12 [2021-10-06 16:21:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:38,935 INFO L225 Difference]: With dead ends: 25026 [2021-10-06 16:21:38,936 INFO L226 Difference]: Without dead ends: 24948 [2021-10-06 16:21:38,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24948 states. [2021-10-06 16:21:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24948 to 21694. [2021-10-06 16:21:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21694 states, 21647 states have (on average 5.45659906684529) internal successors, (118119), 21693 states have internal predecessors, (118119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21694 states to 21694 states and 118119 transitions. [2021-10-06 16:21:39,994 INFO L78 Accepts]: Start accepts. Automaton has 21694 states and 118119 transitions. Word has length 12 [2021-10-06 16:21:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:39,994 INFO L470 AbstractCegarLoop]: Abstraction has 21694 states and 118119 transitions. [2021-10-06 16:21:39,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-10-06 16:21:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 21694 states and 118119 transitions. [2021-10-06 16:21:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-06 16:21:39,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:39,997 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:39,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-06 16:21:39,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1040331094, now seen corresponding path program 2 times [2021-10-06 16:21:39,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:39,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180235158] [2021-10-06 16:21:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:39,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-06 16:21:40,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:40,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180235158] [2021-10-06 16:21:40,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180235158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:40,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765458660] [2021-10-06 16:21:40,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:21:40,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:40,049 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) [2021-10-06 16:21:40,055 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 [2021-10-06 16:21:40,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-06 16:21:40,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:40,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 16:21:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-06 16:21:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765458660] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:40,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 16:21:40,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2021-10-06 16:21:40,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248315250] [2021-10-06 16:21:40,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:40,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:40,176 INFO L87 Difference]: Start difference. First operand 21694 states and 118119 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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) [2021-10-06 16:21:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:40,455 INFO L93 Difference]: Finished difference Result 17714 states and 93297 transitions. [2021-10-06 16:21:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 12 [2021-10-06 16:21:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:40,572 INFO L225 Difference]: With dead ends: 17714 [2021-10-06 16:21:40,572 INFO L226 Difference]: Without dead ends: 17162 [2021-10-06 16:21:40,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-06 16:21:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17162 states. [2021-10-06 16:21:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17162 to 10424. [2021-10-06 16:21:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10424 states, 10401 states have (on average 4.855590808576099) internal successors, (50503), 10423 states have internal predecessors, (50503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10424 states to 10424 states and 50503 transitions. [2021-10-06 16:21:41,350 INFO L78 Accepts]: Start accepts. Automaton has 10424 states and 50503 transitions. Word has length 12 [2021-10-06 16:21:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:41,350 INFO L470 AbstractCegarLoop]: Abstraction has 10424 states and 50503 transitions. [2021-10-06 16:21:41,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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) [2021-10-06 16:21:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 10424 states and 50503 transitions. [2021-10-06 16:21:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-06 16:21:41,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:41,352 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-10-06 16:21:41,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-06 16:21:41,552 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,SelfDestructingSolverStorable25 [2021-10-06 16:21:41,553 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 380412652, now seen corresponding path program 8 times [2021-10-06 16:21:41,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:41,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799310710] [2021-10-06 16:21:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:41,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:41,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:41,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799310710] [2021-10-06 16:21:41,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799310710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:41,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664442858] [2021-10-06 16:21:41,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:21:41,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:41,641 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) [2021-10-06 16:21:41,647 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 [2021-10-06 16:21:41,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:21:41,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:41,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 16:21:41,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:41,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664442858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:41,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:41,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-06 16:21:41,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049231576] [2021-10-06 16:21:41,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 16:21:41,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 16:21:41,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-06 16:21:41,797 INFO L87 Difference]: Start difference. First operand 10424 states and 50503 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-06 16:21:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:42,080 INFO L93 Difference]: Finished difference Result 19452 states and 89984 transitions. [2021-10-06 16:21:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 16:21:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 12 [2021-10-06 16:21:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:42,183 INFO L225 Difference]: With dead ends: 19452 [2021-10-06 16:21:42,183 INFO L226 Difference]: Without dead ends: 19212 [2021-10-06 16:21:42,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-06 16:21:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19212 states. [2021-10-06 16:21:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19212 to 11370. [2021-10-06 16:21:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11347 states have (on average 4.86763021062836) internal successors, (55233), 11369 states have internal predecessors, (55233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 55233 transitions. [2021-10-06 16:21:42,932 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 55233 transitions. Word has length 12 [2021-10-06 16:21:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:42,932 INFO L470 AbstractCegarLoop]: Abstraction has 11370 states and 55233 transitions. [2021-10-06 16:21:42,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-06 16:21:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 55233 transitions. [2021-10-06 16:21:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-06 16:21:42,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:42,934 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:42,963 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 [2021-10-06 16:21:43,141 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,SelfDestructingSolverStorable26 [2021-10-06 16:21:43,142 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1806998999, now seen corresponding path program 5 times [2021-10-06 16:21:43,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:43,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973048766] [2021-10-06 16:21:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:43,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:43,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973048766] [2021-10-06 16:21:43,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973048766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:43,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383611172] [2021-10-06 16:21:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:21:43,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:43,202 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) [2021-10-06 16:21:43,220 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 [2021-10-06 16:21:43,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-06 16:21:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 16:21:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:43,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383611172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:43,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:43,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-06 16:21:43,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339806977] [2021-10-06 16:21:43,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-06 16:21:43,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-06 16:21:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-06 16:21:43,367 INFO L87 Difference]: Start difference. First operand 11370 states and 55233 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-10-06 16:21:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:44,010 INFO L93 Difference]: Finished difference Result 17810 states and 84341 transitions. [2021-10-06 16:21:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 16:21:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 13 [2021-10-06 16:21:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:44,137 INFO L225 Difference]: With dead ends: 17810 [2021-10-06 16:21:44,137 INFO L226 Difference]: Without dead ends: 17730 [2021-10-06 16:21:44,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-06 16:21:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17730 states. [2021-10-06 16:21:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17730 to 12944. [2021-10-06 16:21:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12921 states have (on average 4.8891726646544384) internal successors, (63173), 12943 states have internal predecessors, (63173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 63173 transitions. [2021-10-06 16:21:44,596 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 63173 transitions. Word has length 13 [2021-10-06 16:21:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:44,597 INFO L470 AbstractCegarLoop]: Abstraction has 12944 states and 63173 transitions. [2021-10-06 16:21:44,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-10-06 16:21:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 63173 transitions. [2021-10-06 16:21:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-06 16:21:44,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:44,600 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2021-10-06 16:21:44,638 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 [2021-10-06 16:21:44,816 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,SelfDestructingSolverStorable27 [2021-10-06 16:21:44,817 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1092105869, now seen corresponding path program 9 times [2021-10-06 16:21:44,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:44,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232008406] [2021-10-06 16:21:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:44,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:44,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:44,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232008406] [2021-10-06 16:21:44,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232008406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:44,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248697734] [2021-10-06 16:21:44,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:21:44,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:44,920 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) [2021-10-06 16:21:44,921 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 [2021-10-06 16:21:45,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-06 16:21:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 16:21:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:45,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248697734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:45,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:45,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-06 16:21:45,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823520029] [2021-10-06 16:21:45,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 16:21:45,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 16:21:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-06 16:21:45,103 INFO L87 Difference]: Start difference. First operand 12944 states and 63173 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:45,778 INFO L93 Difference]: Finished difference Result 24324 states and 113167 transitions. [2021-10-06 16:21:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 16:21:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2021-10-06 16:21:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:45,929 INFO L225 Difference]: With dead ends: 24324 [2021-10-06 16:21:45,929 INFO L226 Difference]: Without dead ends: 24060 [2021-10-06 16:21:45,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-06 16:21:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24060 states. [2021-10-06 16:21:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24060 to 14022. [2021-10-06 16:21:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14022 states, 13999 states have (on average 4.899421387241945) internal successors, (68587), 14021 states have internal predecessors, (68587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14022 states to 14022 states and 68587 transitions. [2021-10-06 16:21:46,764 INFO L78 Accepts]: Start accepts. Automaton has 14022 states and 68587 transitions. Word has length 13 [2021-10-06 16:21:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:46,765 INFO L470 AbstractCegarLoop]: Abstraction has 14022 states and 68587 transitions. [2021-10-06 16:21:46,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 14022 states and 68587 transitions. [2021-10-06 16:21:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-06 16:21:46,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:46,770 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:46,797 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 [2021-10-06 16:21:46,983 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,SelfDestructingSolverStorable28 [2021-10-06 16:21:46,984 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash 182396400, now seen corresponding path program 6 times [2021-10-06 16:21:46,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:46,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364512241] [2021-10-06 16:21:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:46,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:47,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:47,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364512241] [2021-10-06 16:21:47,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364512241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:47,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931165698] [2021-10-06 16:21:47,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:21:47,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:47,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:47,043 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) [2021-10-06 16:21:47,071 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 [2021-10-06 16:21:47,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-06 16:21:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:47,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 16:21:47,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:47,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931165698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:47,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:47,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-06 16:21:47,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723430585] [2021-10-06 16:21:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 16:21:47,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 16:21:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-06 16:21:47,217 INFO L87 Difference]: Start difference. First operand 14022 states and 68587 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2021-10-06 16:21:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:47,479 INFO L93 Difference]: Finished difference Result 21992 states and 104786 transitions. [2021-10-06 16:21:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 16:21:47,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 14 [2021-10-06 16:21:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:47,599 INFO L225 Difference]: With dead ends: 21992 [2021-10-06 16:21:47,599 INFO L226 Difference]: Without dead ends: 21904 [2021-10-06 16:21:47,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-06 16:21:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21904 states. [2021-10-06 16:21:48,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21904 to 15728. [2021-10-06 16:21:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15728 states, 15705 states have (on average 4.916332378223496) internal successors, (77211), 15727 states have internal predecessors, (77211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15728 states to 15728 states and 77211 transitions. [2021-10-06 16:21:48,508 INFO L78 Accepts]: Start accepts. Automaton has 15728 states and 77211 transitions. Word has length 14 [2021-10-06 16:21:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:48,508 INFO L470 AbstractCegarLoop]: Abstraction has 15728 states and 77211 transitions. [2021-10-06 16:21:48,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2021-10-06 16:21:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15728 states and 77211 transitions. [2021-10-06 16:21:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-06 16:21:48,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:48,513 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:48,553 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 [2021-10-06 16:21:48,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:48,728 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 169390040, now seen corresponding path program 1 times [2021-10-06 16:21:48,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:48,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704453480] [2021-10-06 16:21:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:48,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 16:21:48,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:48,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704453480] [2021-10-06 16:21:48,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704453480] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-06 16:21:48,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-06 16:21:48,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-06 16:21:48,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46751296] [2021-10-06 16:21:48,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 16:21:48,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 16:21:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 16:21:48,755 INFO L87 Difference]: Start difference. First operand 15728 states and 77211 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:49,252 INFO L93 Difference]: Finished difference Result 13926 states and 66685 transitions. [2021-10-06 16:21:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 16:21:49,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-10-06 16:21:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:49,329 INFO L225 Difference]: With dead ends: 13926 [2021-10-06 16:21:49,329 INFO L226 Difference]: Without dead ends: 12308 [2021-10-06 16:21:49,329 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 [2021-10-06 16:21:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12308 states. [2021-10-06 16:21:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12308 to 9942. [2021-10-06 16:21:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9942 states, 9927 states have (on average 4.572479097411101) internal successors, (45391), 9941 states have internal predecessors, (45391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9942 states to 9942 states and 45391 transitions. [2021-10-06 16:21:49,620 INFO L78 Accepts]: Start accepts. Automaton has 9942 states and 45391 transitions. Word has length 14 [2021-10-06 16:21:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:49,620 INFO L470 AbstractCegarLoop]: Abstraction has 9942 states and 45391 transitions. [2021-10-06 16:21:49,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 9942 states and 45391 transitions. [2021-10-06 16:21:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-06 16:21:49,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:49,624 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-10-06 16:21:49,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-06 16:21:49,625 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash 504460236, now seen corresponding path program 10 times [2021-10-06 16:21:49,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:49,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283177871] [2021-10-06 16:21:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:49,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:49,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:49,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283177871] [2021-10-06 16:21:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283177871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:49,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003385773] [2021-10-06 16:21:49,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:21:49,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:49,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:49,715 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) [2021-10-06 16:21:49,716 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 [2021-10-06 16:21:49,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:21:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 16:21:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003385773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:49,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:49,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-06 16:21:49,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815678544] [2021-10-06 16:21:49,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 16:21:49,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 16:21:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-06 16:21:49,871 INFO L87 Difference]: Start difference. First operand 9942 states and 45391 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-10-06 16:21:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:50,541 INFO L93 Difference]: Finished difference Result 18616 states and 81746 transitions. [2021-10-06 16:21:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-06 16:21:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 14 [2021-10-06 16:21:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:50,641 INFO L225 Difference]: With dead ends: 18616 [2021-10-06 16:21:50,641 INFO L226 Difference]: Without dead ends: 17728 [2021-10-06 16:21:50,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-06 16:21:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-10-06 16:21:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 10688. [2021-10-06 16:21:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10688 states, 10673 states have (on average 4.580249227021456) internal successors, (48885), 10687 states have internal predecessors, (48885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10688 states to 10688 states and 48885 transitions. [2021-10-06 16:21:51,029 INFO L78 Accepts]: Start accepts. Automaton has 10688 states and 48885 transitions. Word has length 14 [2021-10-06 16:21:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:51,029 INFO L470 AbstractCegarLoop]: Abstraction has 10688 states and 48885 transitions. [2021-10-06 16:21:51,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-10-06 16:21:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10688 states and 48885 transitions. [2021-10-06 16:21:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-06 16:21:51,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:51,034 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:51,060 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 [2021-10-06 16:21:51,248 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,SelfDestructingSolverStorable31 [2021-10-06 16:21:51,249 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1359323383, now seen corresponding path program 7 times [2021-10-06 16:21:51,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:51,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079073491] [2021-10-06 16:21:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:51,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:51,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:51,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079073491] [2021-10-06 16:21:51,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079073491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:51,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050109870] [2021-10-06 16:21:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:21:51,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:51,331 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:21:51,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-06 16:21:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:51,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 16:21:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:51,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050109870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:51,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:51,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-06 16:21:51,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430601443] [2021-10-06 16:21:51,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 16:21:51,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:51,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 16:21:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-06 16:21:51,508 INFO L87 Difference]: Start difference. First operand 10688 states and 48885 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:51,926 INFO L93 Difference]: Finished difference Result 16830 states and 76723 transitions. [2021-10-06 16:21:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 16:21:51,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-06 16:21:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:52,006 INFO L225 Difference]: With dead ends: 16830 [2021-10-06 16:21:52,006 INFO L226 Difference]: Without dead ends: 15920 [2021-10-06 16:21:52,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-06 16:21:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15920 states. [2021-10-06 16:21:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15920 to 11704. [2021-10-06 16:21:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11704 states, 11689 states have (on average 4.58952861664813) internal successors, (53647), 11703 states have internal predecessors, (53647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11704 states to 11704 states and 53647 transitions. [2021-10-06 16:21:52,370 INFO L78 Accepts]: Start accepts. Automaton has 11704 states and 53647 transitions. Word has length 15 [2021-10-06 16:21:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 11704 states and 53647 transitions. [2021-10-06 16:21:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 11704 states and 53647 transitions. [2021-10-06 16:21:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-06 16:21:52,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:52,375 INFO L512 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2021-10-06 16:21:52,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-06 16:21:52,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:52,589 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1541598061, now seen corresponding path program 11 times [2021-10-06 16:21:52,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:52,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743582965] [2021-10-06 16:21:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:52,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:52,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:52,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743582965] [2021-10-06 16:21:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743582965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:52,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075569190] [2021-10-06 16:21:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:21:52,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:52,707 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:21:52,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-06 16:21:52,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-06 16:21:52,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:52,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 16:21:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:52,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075569190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:52,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:52,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-06 16:21:52,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956634145] [2021-10-06 16:21:52,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 16:21:52,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 16:21:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-06 16:21:52,898 INFO L87 Difference]: Start difference. First operand 11704 states and 53647 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:53,338 INFO L93 Difference]: Finished difference Result 22034 states and 97117 transitions. [2021-10-06 16:21:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 16:21:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-06 16:21:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:53,434 INFO L225 Difference]: With dead ends: 22034 [2021-10-06 16:21:53,434 INFO L226 Difference]: Without dead ends: 20942 [2021-10-06 16:21:53,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-06 16:21:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20942 states. [2021-10-06 16:21:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20942 to 12520. [2021-10-06 16:21:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12520 states, 12505 states have (on average 4.59624150339864) internal successors, (57476), 12519 states have internal predecessors, (57476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 57476 transitions. [2021-10-06 16:21:54,160 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 57476 transitions. Word has length 15 [2021-10-06 16:21:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:54,161 INFO L470 AbstractCegarLoop]: Abstraction has 12520 states and 57476 transitions. [2021-10-06 16:21:54,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 57476 transitions. [2021-10-06 16:21:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 16:21:54,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:54,166 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:54,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-06 16:21:54,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:54,367 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:54,368 INFO L82 PathProgramCache]: Analyzing trace with hash -810645808, now seen corresponding path program 8 times [2021-10-06 16:21:54,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:54,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106021925] [2021-10-06 16:21:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:54,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:54,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:54,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106021925] [2021-10-06 16:21:54,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106021925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:54,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760021997] [2021-10-06 16:21:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:21:54,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:54,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:54,447 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:21:54,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-06 16:21:54,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:21:54,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:54,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 16:21:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:54,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760021997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:54,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:54,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-06 16:21:54,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748086800] [2021-10-06 16:21:54,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 16:21:54,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:54,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 16:21:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-06 16:21:54,636 INFO L87 Difference]: Start difference. First operand 12520 states and 57476 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2021-10-06 16:21:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:54,848 INFO L93 Difference]: Finished difference Result 19826 states and 90713 transitions. [2021-10-06 16:21:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 16:21:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 16 [2021-10-06 16:21:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:54,929 INFO L225 Difference]: With dead ends: 19826 [2021-10-06 16:21:54,929 INFO L226 Difference]: Without dead ends: 18736 [2021-10-06 16:21:54,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-06 16:21:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18736 states. [2021-10-06 16:21:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18736 to 13606. [2021-10-06 16:21:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13606 states, 13591 states have (on average 4.604002648811714) internal successors, (62573), 13605 states have internal predecessors, (62573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13606 states to 13606 states and 62573 transitions. [2021-10-06 16:21:55,700 INFO L78 Accepts]: Start accepts. Automaton has 13606 states and 62573 transitions. Word has length 16 [2021-10-06 16:21:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:55,700 INFO L470 AbstractCegarLoop]: Abstraction has 13606 states and 62573 transitions. [2021-10-06 16:21:55,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2021-10-06 16:21:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13606 states and 62573 transitions. [2021-10-06 16:21:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-06 16:21:55,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:55,707 INFO L512 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2021-10-06 16:21:55,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-06 16:21:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-06 16:21:55,908 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash -544895828, now seen corresponding path program 12 times [2021-10-06 16:21:55,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:55,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204508461] [2021-10-06 16:21:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:55,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:56,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:56,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204508461] [2021-10-06 16:21:56,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204508461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:56,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360711328] [2021-10-06 16:21:56,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:21:56,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:56,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:56,077 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:21:56,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-06 16:21:56,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-06 16:21:56,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 16:21:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:56,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360711328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:56,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:56,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-06 16:21:56,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804110475] [2021-10-06 16:21:56,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 16:21:56,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:56,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 16:21:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-06 16:21:56,285 INFO L87 Difference]: Start difference. First operand 13606 states and 62573 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2021-10-06 16:21:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:56,641 INFO L93 Difference]: Finished difference Result 25736 states and 113790 transitions. [2021-10-06 16:21:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 16:21:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 16 [2021-10-06 16:21:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:56,760 INFO L225 Difference]: With dead ends: 25736 [2021-10-06 16:21:56,761 INFO L226 Difference]: Without dead ends: 24420 [2021-10-06 16:21:56,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-06 16:21:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24420 states. [2021-10-06 16:21:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24420 to 14492. [2021-10-06 16:21:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14492 states, 14477 states have (on average 4.609863922083305) internal successors, (66737), 14491 states have internal predecessors, (66737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14492 states to 14492 states and 66737 transitions. [2021-10-06 16:21:57,613 INFO L78 Accepts]: Start accepts. Automaton has 14492 states and 66737 transitions. Word has length 16 [2021-10-06 16:21:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:57,613 INFO L470 AbstractCegarLoop]: Abstraction has 14492 states and 66737 transitions. [2021-10-06 16:21:57,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2021-10-06 16:21:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 14492 states and 66737 transitions. [2021-10-06 16:21:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 16:21:57,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:57,622 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:21:57,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-06 16:21:57,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-06 16:21:57,825 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:21:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:21:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 639786007, now seen corresponding path program 9 times [2021-10-06 16:21:57,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:21:57,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643168945] [2021-10-06 16:21:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:21:57,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:21:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:21:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:57,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:21:57,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643168945] [2021-10-06 16:21:57,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643168945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:57,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264488099] [2021-10-06 16:21:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:21:57,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:21:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:21:57,917 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:21:57,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-06 16:21:58,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-06 16:21:58,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:21:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 16:21:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:21:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:21:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264488099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:21:58,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:21:58,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-06 16:21:58,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051928191] [2021-10-06 16:21:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 16:21:58,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:21:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 16:21:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-06 16:21:58,145 INFO L87 Difference]: Start difference. First operand 14492 states and 66737 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:21:58,964 INFO L93 Difference]: Finished difference Result 23058 states and 105829 transitions. [2021-10-06 16:21:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 16:21:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-06 16:21:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:21:59,098 INFO L225 Difference]: With dead ends: 23058 [2021-10-06 16:21:59,098 INFO L226 Difference]: Without dead ends: 21772 [2021-10-06 16:21:59,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-06 16:21:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21772 states. [2021-10-06 16:21:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21772 to 15648. [2021-10-06 16:21:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15648 states, 15633 states have (on average 4.616452376383291) internal successors, (72169), 15647 states have internal predecessors, (72169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15648 states to 15648 states and 72169 transitions. [2021-10-06 16:21:59,886 INFO L78 Accepts]: Start accepts. Automaton has 15648 states and 72169 transitions. Word has length 17 [2021-10-06 16:21:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:21:59,886 INFO L470 AbstractCegarLoop]: Abstraction has 15648 states and 72169 transitions. [2021-10-06 16:21:59,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:21:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15648 states and 72169 transitions. [2021-10-06 16:21:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-06 16:21:59,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:21:59,893 INFO L512 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2021-10-06 16:21:59,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:00,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:00,095 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash 288102323, now seen corresponding path program 13 times [2021-10-06 16:22:00,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:00,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208882453] [2021-10-06 16:22:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:00,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:00,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:00,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208882453] [2021-10-06 16:22:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208882453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:00,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688270365] [2021-10-06 16:22:00,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:22:00,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:00,226 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:00,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-06 16:22:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-06 16:22:00,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:00,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688270365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:00,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:00,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-06 16:22:00,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266212567] [2021-10-06 16:22:00,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 16:22:00,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 16:22:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-06 16:22:00,431 INFO L87 Difference]: Start difference. First operand 15648 states and 72169 transitions. Second operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-10-06 16:22:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:00,794 INFO L93 Difference]: Finished difference Result 29722 states and 131765 transitions. [2021-10-06 16:22:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 16:22:00,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 17 [2021-10-06 16:22:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:00,930 INFO L225 Difference]: With dead ends: 29722 [2021-10-06 16:22:00,931 INFO L226 Difference]: Without dead ends: 28162 [2021-10-06 16:22:00,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-06 16:22:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28162 states. [2021-10-06 16:22:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28162 to 16604. [2021-10-06 16:22:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 16589 states have (on average 4.621616733980348) internal successors, (76668), 16603 states have internal predecessors, (76668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 76668 transitions. [2021-10-06 16:22:01,963 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 76668 transitions. Word has length 17 [2021-10-06 16:22:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:01,964 INFO L470 AbstractCegarLoop]: Abstraction has 16604 states and 76668 transitions. [2021-10-06 16:22:01,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-10-06 16:22:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 76668 transitions. [2021-10-06 16:22:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 16:22:01,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:01,971 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:01,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-06 16:22:02,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-06 16:22:02,172 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1641467984, now seen corresponding path program 10 times [2021-10-06 16:22:02,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:02,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161592173] [2021-10-06 16:22:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:02,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:02,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:02,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161592173] [2021-10-06 16:22:02,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161592173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:02,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528239064] [2021-10-06 16:22:02,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:22:02,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:02,286 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:02,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-06 16:22:02,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:22:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-06 16:22:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:02,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528239064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:02,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:02,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-06 16:22:02,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551911682] [2021-10-06 16:22:02,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 16:22:02,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 16:22:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-06 16:22:02,736 INFO L87 Difference]: Start difference. First operand 16604 states and 76668 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:03,061 INFO L93 Difference]: Finished difference Result 26526 states and 122071 transitions. [2021-10-06 16:22:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-06 16:22:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 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 18 [2021-10-06 16:22:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:03,175 INFO L225 Difference]: With dead ends: 26526 [2021-10-06 16:22:03,176 INFO L226 Difference]: Without dead ends: 25028 [2021-10-06 16:22:03,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-06 16:22:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25028 states. [2021-10-06 16:22:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25028 to 17830. [2021-10-06 16:22:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17830 states, 17815 states have (on average 4.627280381700814) internal successors, (82435), 17829 states have internal predecessors, (82435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17830 states to 17830 states and 82435 transitions. [2021-10-06 16:22:04,063 INFO L78 Accepts]: Start accepts. Automaton has 17830 states and 82435 transitions. Word has length 18 [2021-10-06 16:22:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:04,064 INFO L470 AbstractCegarLoop]: Abstraction has 17830 states and 82435 transitions. [2021-10-06 16:22:04,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 17830 states and 82435 transitions. [2021-10-06 16:22:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-06 16:22:04,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:04,074 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2021-10-06 16:22:04,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:04,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-06 16:22:04,275 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash 341241228, now seen corresponding path program 14 times [2021-10-06 16:22:04,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:04,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487407171] [2021-10-06 16:22:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:04,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:04,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:04,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487407171] [2021-10-06 16:22:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487407171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:04,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880002283] [2021-10-06 16:22:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:22:04,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:04,431 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:04,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-06 16:22:04,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:22:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-06 16:22:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880002283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:04,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-06 16:22:04,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353536815] [2021-10-06 16:22:04,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 16:22:04,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 16:22:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-06 16:22:04,641 INFO L87 Difference]: Start difference. First operand 17830 states and 82435 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-10-06 16:22:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:05,503 INFO L93 Difference]: Finished difference Result 33992 states and 151042 transitions. [2021-10-06 16:22:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 16:22:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 18 [2021-10-06 16:22:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:05,762 INFO L225 Difference]: With dead ends: 33992 [2021-10-06 16:22:05,762 INFO L226 Difference]: Without dead ends: 32168 [2021-10-06 16:22:05,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-06 16:22:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32168 states. [2021-10-06 16:22:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32168 to 18856. [2021-10-06 16:22:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18856 states, 18841 states have (on average 4.631866673743432) internal successors, (87269), 18855 states have internal predecessors, (87269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18856 states to 18856 states and 87269 transitions. [2021-10-06 16:22:06,807 INFO L78 Accepts]: Start accepts. Automaton has 18856 states and 87269 transitions. Word has length 18 [2021-10-06 16:22:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:06,807 INFO L470 AbstractCegarLoop]: Abstraction has 18856 states and 87269 transitions. [2021-10-06 16:22:06,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-10-06 16:22:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 18856 states and 87269 transitions. [2021-10-06 16:22:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 16:22:06,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:06,817 INFO L512 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:06,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-06 16:22:07,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-06 16:22:07,018 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 654102327, now seen corresponding path program 11 times [2021-10-06 16:22:07,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:07,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232805550] [2021-10-06 16:22:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:07,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:07,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:07,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232805550] [2021-10-06 16:22:07,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232805550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:07,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190173436] [2021-10-06 16:22:07,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:22:07,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:07,139 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:07,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-06 16:22:07,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-06 16:22:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-06 16:22:07,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:07,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190173436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:07,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:07,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-06 16:22:07,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749876758] [2021-10-06 16:22:07,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 16:22:07,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 16:22:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-06 16:22:07,360 INFO L87 Difference]: Start difference. First operand 18856 states and 87269 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2021-10-06 16:22:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:07,732 INFO L93 Difference]: Finished difference Result 30230 states and 139439 transitions. [2021-10-06 16:22:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 16:22:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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 19 [2021-10-06 16:22:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:08,398 INFO L225 Difference]: With dead ends: 30230 [2021-10-06 16:22:08,398 INFO L226 Difference]: Without dead ends: 28504 [2021-10-06 16:22:08,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-06 16:22:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28504 states. [2021-10-06 16:22:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28504 to 20152. [2021-10-06 16:22:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20152 states, 20137 states have (on average 4.636788002185033) internal successors, (93371), 20151 states have internal predecessors, (93371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20152 states to 20152 states and 93371 transitions. [2021-10-06 16:22:09,464 INFO L78 Accepts]: Start accepts. Automaton has 20152 states and 93371 transitions. Word has length 19 [2021-10-06 16:22:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:09,465 INFO L470 AbstractCegarLoop]: Abstraction has 20152 states and 93371 transitions. [2021-10-06 16:22:09,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2021-10-06 16:22:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 20152 states and 93371 transitions. [2021-10-06 16:22:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-06 16:22:09,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:09,475 INFO L512 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2021-10-06 16:22:09,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:09,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-06 16:22:09,677 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:09,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1988547283, now seen corresponding path program 15 times [2021-10-06 16:22:09,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:09,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693829458] [2021-10-06 16:22:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:09,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:09,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:09,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693829458] [2021-10-06 16:22:09,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693829458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:09,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643495814] [2021-10-06 16:22:09,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:22:09,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:09,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:09,849 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:09,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-06 16:22:10,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-06 16:22:10,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-06 16:22:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:10,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643495814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:10,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:10,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-06 16:22:10,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123859778] [2021-10-06 16:22:10,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 16:22:10,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 16:22:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-06 16:22:10,124 INFO L87 Difference]: Start difference. First operand 20152 states and 93371 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:10,655 INFO L93 Difference]: Finished difference Result 38546 states and 171621 transitions. [2021-10-06 16:22:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 16:22:10,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-06 16:22:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:11,361 INFO L225 Difference]: With dead ends: 38546 [2021-10-06 16:22:11,362 INFO L226 Difference]: Without dead ends: 36438 [2021-10-06 16:22:11,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-06 16:22:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36438 states. [2021-10-06 16:22:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36438 to 21248. [2021-10-06 16:22:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21248 states, 21233 states have (on average 4.640889181933782) internal successors, (98540), 21247 states have internal predecessors, (98540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21248 states to 21248 states and 98540 transitions. [2021-10-06 16:22:12,434 INFO L78 Accepts]: Start accepts. Automaton has 21248 states and 98540 transitions. Word has length 19 [2021-10-06 16:22:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:12,435 INFO L470 AbstractCegarLoop]: Abstraction has 21248 states and 98540 transitions. [2021-10-06 16:22:12,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21248 states and 98540 transitions. [2021-10-06 16:22:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 16:22:12,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:12,446 INFO L512 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:12,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:12,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:12,647 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:12,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1197662064, now seen corresponding path program 12 times [2021-10-06 16:22:12,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:12,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695664957] [2021-10-06 16:22:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:12,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:12,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:12,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695664957] [2021-10-06 16:22:12,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695664957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:12,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257615521] [2021-10-06 16:22:12,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:22:12,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:12,779 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:12,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-06 16:22:12,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-06 16:22:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 16:22:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:13,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257615521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:13,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:13,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-06 16:22:13,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142819773] [2021-10-06 16:22:13,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 16:22:13,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 16:22:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-06 16:22:13,028 INFO L87 Difference]: Start difference. First operand 21248 states and 98540 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2021-10-06 16:22:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:13,389 INFO L93 Difference]: Finished difference Result 34170 states and 157933 transitions. [2021-10-06 16:22:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 16:22:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 20 [2021-10-06 16:22:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:14,039 INFO L225 Difference]: With dead ends: 34170 [2021-10-06 16:22:14,039 INFO L226 Difference]: Without dead ends: 32200 [2021-10-06 16:22:14,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-06 16:22:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32200 states. [2021-10-06 16:22:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32200 to 22614. [2021-10-06 16:22:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22614 states, 22599 states have (on average 4.645205540068145) internal successors, (104977), 22613 states have internal predecessors, (104977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22614 states to 22614 states and 104977 transitions. [2021-10-06 16:22:15,253 INFO L78 Accepts]: Start accepts. Automaton has 22614 states and 104977 transitions. Word has length 20 [2021-10-06 16:22:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:15,256 INFO L470 AbstractCegarLoop]: Abstraction has 22614 states and 104977 transitions. [2021-10-06 16:22:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2021-10-06 16:22:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 22614 states and 104977 transitions. [2021-10-06 16:22:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-06 16:22:15,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:15,277 INFO L512 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2021-10-06 16:22:15,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:15,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-06 16:22:15,490 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1515427436, now seen corresponding path program 16 times [2021-10-06 16:22:15,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:15,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133870021] [2021-10-06 16:22:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:15,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:15,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:15,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133870021] [2021-10-06 16:22:15,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133870021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:15,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521620916] [2021-10-06 16:22:15,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:22:15,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:15,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:15,741 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:15,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-06 16:22:15,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:22:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-06 16:22:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:15,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521620916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:15,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:15,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-06 16:22:15,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658603975] [2021-10-06 16:22:15,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 16:22:15,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 16:22:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-06 16:22:15,951 INFO L87 Difference]: Start difference. First operand 22614 states and 104977 transitions. Second operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-10-06 16:22:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:16,968 INFO L93 Difference]: Finished difference Result 43384 states and 193502 transitions. [2021-10-06 16:22:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 16:22:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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 20 [2021-10-06 16:22:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:17,343 INFO L225 Difference]: With dead ends: 43384 [2021-10-06 16:22:17,344 INFO L226 Difference]: Without dead ends: 40972 [2021-10-06 16:22:17,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-06 16:22:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40972 states. [2021-10-06 16:22:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40972 to 23780. [2021-10-06 16:22:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23780 states, 23765 states have (on average 4.648895434462445) internal successors, (110481), 23779 states have internal predecessors, (110481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23780 states to 23780 states and 110481 transitions. [2021-10-06 16:22:18,578 INFO L78 Accepts]: Start accepts. Automaton has 23780 states and 110481 transitions. Word has length 20 [2021-10-06 16:22:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 23780 states and 110481 transitions. [2021-10-06 16:22:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-10-06 16:22:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 23780 states and 110481 transitions. [2021-10-06 16:22:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 16:22:18,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:18,593 INFO L512 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:18,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:18,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:18,794 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1527183959, now seen corresponding path program 13 times [2021-10-06 16:22:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:18,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219365062] [2021-10-06 16:22:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:18,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:18,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:18,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219365062] [2021-10-06 16:22:18,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219365062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:18,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614961899] [2021-10-06 16:22:18,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:22:18,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:18,943 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:18,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-06 16:22:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-06 16:22:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:19,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614961899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:19,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-06 16:22:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007563706] [2021-10-06 16:22:19,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 16:22:19,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 16:22:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-06 16:22:19,183 INFO L87 Difference]: Start difference. First operand 23780 states and 110481 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:20,079 INFO L93 Difference]: Finished difference Result 38346 states and 177553 transitions. [2021-10-06 16:22:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 16:22:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-06 16:22:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:20,300 INFO L225 Difference]: With dead ends: 38346 [2021-10-06 16:22:20,300 INFO L226 Difference]: Without dead ends: 36116 [2021-10-06 16:22:20,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-06 16:22:20,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36116 states. [2021-10-06 16:22:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36116 to 25216. [2021-10-06 16:22:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25216 states, 25201 states have (on average 4.652712193960557) internal successors, (117253), 25215 states have internal predecessors, (117253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25216 states to 25216 states and 117253 transitions. [2021-10-06 16:22:21,511 INFO L78 Accepts]: Start accepts. Automaton has 25216 states and 117253 transitions. Word has length 21 [2021-10-06 16:22:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:21,512 INFO L470 AbstractCegarLoop]: Abstraction has 25216 states and 117253 transitions. [2021-10-06 16:22:21,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 25216 states and 117253 transitions. [2021-10-06 16:22:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 16:22:21,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:21,530 INFO L512 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2021-10-06 16:22:21,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-06 16:22:21,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-06 16:22:21,736 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash -266385933, now seen corresponding path program 17 times [2021-10-06 16:22:21,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:21,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175945131] [2021-10-06 16:22:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:21,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:21,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:21,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175945131] [2021-10-06 16:22:21,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175945131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:21,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813949579] [2021-10-06 16:22:21,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:22:21,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:21,934 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:21,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-06 16:22:22,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-06 16:22:22,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-06 16:22:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:22,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813949579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:22,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:22,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-06 16:22:22,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215769477] [2021-10-06 16:22:22,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-06 16:22:22,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:22,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-06 16:22:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-06 16:22:22,184 INFO L87 Difference]: Start difference. First operand 25216 states and 117253 transitions. Second operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:23,222 INFO L93 Difference]: Finished difference Result 48506 states and 216685 transitions. [2021-10-06 16:22:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 16:22:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-06 16:22:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:23,474 INFO L225 Difference]: With dead ends: 48506 [2021-10-06 16:22:23,474 INFO L226 Difference]: Without dead ends: 45770 [2021-10-06 16:22:23,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-06 16:22:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45770 states. [2021-10-06 16:22:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45770 to 26452. [2021-10-06 16:22:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26452 states, 26437 states have (on average 4.656050232628513) internal successors, (123092), 26451 states have internal predecessors, (123092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26452 states to 26452 states and 123092 transitions. [2021-10-06 16:22:25,223 INFO L78 Accepts]: Start accepts. Automaton has 26452 states and 123092 transitions. Word has length 21 [2021-10-06 16:22:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 26452 states and 123092 transitions. [2021-10-06 16:22:25,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 26452 states and 123092 transitions. [2021-10-06 16:22:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 16:22:25,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:25,241 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:25,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:25,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:25,442 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 98064752, now seen corresponding path program 14 times [2021-10-06 16:22:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:25,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241756504] [2021-10-06 16:22:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:25,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:25,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241756504] [2021-10-06 16:22:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241756504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:25,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100282651] [2021-10-06 16:22:25,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:22:25,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:25,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:25,610 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:25,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-06 16:22:25,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:22:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:25,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-06 16:22:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:25,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100282651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:25,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:25,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-06 16:22:25,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903194319] [2021-10-06 16:22:25,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 16:22:25,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 16:22:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-06 16:22:25,900 INFO L87 Difference]: Start difference. First operand 26452 states and 123092 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) [2021-10-06 16:22:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:26,925 INFO L93 Difference]: Finished difference Result 42758 states and 198299 transitions. [2021-10-06 16:22:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 16:22:26,926 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 22 [2021-10-06 16:22:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:27,277 INFO L225 Difference]: With dead ends: 42758 [2021-10-06 16:22:27,278 INFO L226 Difference]: Without dead ends: 40252 [2021-10-06 16:22:27,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-06 16:22:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40252 states. [2021-10-06 16:22:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40252 to 27958. [2021-10-06 16:22:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27958 states, 27943 states have (on average 4.659449593815983) internal successors, (130199), 27957 states have internal predecessors, (130199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27958 states to 27958 states and 130199 transitions. [2021-10-06 16:22:28,709 INFO L78 Accepts]: Start accepts. Automaton has 27958 states and 130199 transitions. Word has length 22 [2021-10-06 16:22:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:28,711 INFO L470 AbstractCegarLoop]: Abstraction has 27958 states and 130199 transitions. [2021-10-06 16:22:28,711 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) [2021-10-06 16:22:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27958 states and 130199 transitions. [2021-10-06 16:22:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 16:22:28,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:28,730 INFO L512 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2021-10-06 16:22:28,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:28,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:28,936 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash 331974476, now seen corresponding path program 18 times [2021-10-06 16:22:28,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:28,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798449844] [2021-10-06 16:22:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:28,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:29,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:29,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798449844] [2021-10-06 16:22:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798449844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:29,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500601658] [2021-10-06 16:22:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:22:29,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:29,584 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:29,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-06 16:22:29,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-06 16:22:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-06 16:22:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:29,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500601658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:29,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:29,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-06 16:22:29,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614171056] [2021-10-06 16:22:29,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-06 16:22:29,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:29,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-06 16:22:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-06 16:22:29,874 INFO L87 Difference]: Start difference. First operand 27958 states and 130199 transitions. Second operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:30,567 INFO L93 Difference]: Finished difference Result 53912 states and 241170 transitions. [2021-10-06 16:22:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 16:22:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 16:22:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:31,383 INFO L225 Difference]: With dead ends: 53912 [2021-10-06 16:22:31,383 INFO L226 Difference]: Without dead ends: 50832 [2021-10-06 16:22:31,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-06 16:22:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50832 states. [2021-10-06 16:22:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50832 to 29264. [2021-10-06 16:22:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29264 states, 29249 states have (on average 4.66248418749359) internal successors, (136373), 29263 states have internal predecessors, (136373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29264 states to 29264 states and 136373 transitions. [2021-10-06 16:22:32,805 INFO L78 Accepts]: Start accepts. Automaton has 29264 states and 136373 transitions. Word has length 22 [2021-10-06 16:22:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:32,806 INFO L470 AbstractCegarLoop]: Abstraction has 29264 states and 136373 transitions. [2021-10-06 16:22:32,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 29264 states and 136373 transitions. [2021-10-06 16:22:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 16:22:32,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:32,829 INFO L512 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:32,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-06 16:22:33,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-06 16:22:33,030 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:33,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1254957705, now seen corresponding path program 15 times [2021-10-06 16:22:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:33,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094096748] [2021-10-06 16:22:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:33,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:33,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:33,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094096748] [2021-10-06 16:22:33,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094096748] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:33,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12823165] [2021-10-06 16:22:33,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:22:33,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:33,196 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:33,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-06 16:22:33,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-06 16:22:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-06 16:22:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:33,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12823165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:33,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:33,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-06 16:22:33,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648059386] [2021-10-06 16:22:33,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-06 16:22:33,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-06 16:22:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-06 16:22:33,486 INFO L87 Difference]: Start difference. First operand 29264 states and 136373 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:34,620 INFO L93 Difference]: Finished difference Result 47406 states and 220171 transitions. [2021-10-06 16:22:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 16:22:34,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 16:22:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:34,892 INFO L225 Difference]: With dead ends: 47406 [2021-10-06 16:22:34,892 INFO L226 Difference]: Without dead ends: 44608 [2021-10-06 16:22:34,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-06 16:22:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44608 states. [2021-10-06 16:22:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44608 to 30840. [2021-10-06 16:22:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30840 states, 30825 states have (on average 4.665531224655313) internal successors, (143815), 30839 states have internal predecessors, (143815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30840 states to 30840 states and 143815 transitions. [2021-10-06 16:22:36,915 INFO L78 Accepts]: Start accepts. Automaton has 30840 states and 143815 transitions. Word has length 23 [2021-10-06 16:22:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:36,915 INFO L470 AbstractCegarLoop]: Abstraction has 30840 states and 143815 transitions. [2021-10-06 16:22:36,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30840 states and 143815 transitions. [2021-10-06 16:22:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 16:22:36,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:36,937 INFO L512 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2021-10-06 16:22:36,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:37,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-06 16:22:37,138 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1701277971, now seen corresponding path program 19 times [2021-10-06 16:22:37,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:37,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690892437] [2021-10-06 16:22:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:37,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:37,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:37,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690892437] [2021-10-06 16:22:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690892437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:37,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155869374] [2021-10-06 16:22:37,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:22:37,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:37,365 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:37,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-06 16:22:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-06 16:22:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155869374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:37,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:37,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-06 16:22:37,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007655051] [2021-10-06 16:22:37,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-06 16:22:37,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-06 16:22:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-06 16:22:37,636 INFO L87 Difference]: Start difference. First operand 30840 states and 143815 transitions. Second operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2021-10-06 16:22:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:38,880 INFO L93 Difference]: Finished difference Result 59602 states and 266957 transitions. [2021-10-06 16:22:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-06 16:22:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 16:22:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:39,243 INFO L225 Difference]: With dead ends: 59602 [2021-10-06 16:22:39,243 INFO L226 Difference]: Without dead ends: 56158 [2021-10-06 16:22:39,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-06 16:22:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56158 states. [2021-10-06 16:22:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56158 to 32216. [2021-10-06 16:22:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32216 states, 32201 states have (on average 4.668302226638924) internal successors, (150324), 32215 states have internal predecessors, (150324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32216 states to 32216 states and 150324 transitions. [2021-10-06 16:22:41,288 INFO L78 Accepts]: Start accepts. Automaton has 32216 states and 150324 transitions. Word has length 23 [2021-10-06 16:22:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:41,288 INFO L470 AbstractCegarLoop]: Abstraction has 32216 states and 150324 transitions. [2021-10-06 16:22:41,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2021-10-06 16:22:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32216 states and 150324 transitions. [2021-10-06 16:22:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 16:22:41,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:41,309 INFO L512 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:41,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-06 16:22:41,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-06 16:22:41,510 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash -248980912, now seen corresponding path program 16 times [2021-10-06 16:22:41,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:41,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695934017] [2021-10-06 16:22:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:41,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:41,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:41,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695934017] [2021-10-06 16:22:41,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695934017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:41,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095723844] [2021-10-06 16:22:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:22:41,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:41,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:41,696 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:41,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-06 16:22:41,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:22:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-06 16:22:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:41,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095723844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:41,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:41,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-06 16:22:41,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010849272] [2021-10-06 16:22:41,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-06 16:22:41,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:41,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-06 16:22:41,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-06 16:22:41,979 INFO L87 Difference]: Start difference. First operand 32216 states and 150324 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) [2021-10-06 16:22:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:43,190 INFO L93 Difference]: Finished difference Result 52290 states and 243169 transitions. [2021-10-06 16:22:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 16:22:43,190 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 24 [2021-10-06 16:22:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:43,541 INFO L225 Difference]: With dead ends: 52290 [2021-10-06 16:22:43,541 INFO L226 Difference]: Without dead ends: 49184 [2021-10-06 16:22:43,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-06 16:22:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49184 states. [2021-10-06 16:22:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49184 to 33862. [2021-10-06 16:22:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33862 states, 33847 states have (on average 4.671049132862588) internal successors, (158101), 33861 states have internal predecessors, (158101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33862 states to 33862 states and 158101 transitions. [2021-10-06 16:22:45,634 INFO L78 Accepts]: Start accepts. Automaton has 33862 states and 158101 transitions. Word has length 24 [2021-10-06 16:22:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:45,635 INFO L470 AbstractCegarLoop]: Abstraction has 33862 states and 158101 transitions. [2021-10-06 16:22:45,635 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) [2021-10-06 16:22:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33862 states and 158101 transitions. [2021-10-06 16:22:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 16:22:45,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:45,660 INFO L512 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2021-10-06 16:22:45,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:45,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:45,861 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1200013356, now seen corresponding path program 20 times [2021-10-06 16:22:45,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:45,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386841429] [2021-10-06 16:22:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:45,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:46,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:46,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386841429] [2021-10-06 16:22:46,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386841429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:46,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139620489] [2021-10-06 16:22:46,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:22:46,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:46,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:46,128 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:46,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-06 16:22:46,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:22:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 16:22:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:46,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139620489] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:46,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:46,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-06 16:22:46,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166738981] [2021-10-06 16:22:46,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 16:22:46,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 16:22:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-06 16:22:46,442 INFO L87 Difference]: Start difference. First operand 33862 states and 158101 transitions. Second operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-10-06 16:22:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:47,740 INFO L93 Difference]: Finished difference Result 65576 states and 294046 transitions. [2021-10-06 16:22:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-06 16:22:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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 24 [2021-10-06 16:22:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:48,656 INFO L225 Difference]: With dead ends: 65576 [2021-10-06 16:22:48,657 INFO L226 Difference]: Without dead ends: 61748 [2021-10-06 16:22:48,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-06 16:22:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61748 states. [2021-10-06 16:22:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61748 to 35308. [2021-10-06 16:22:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35308 states, 35293 states have (on average 4.673589663672683) internal successors, (164945), 35307 states have internal predecessors, (164945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35308 states to 35308 states and 164945 transitions. [2021-10-06 16:22:50,891 INFO L78 Accepts]: Start accepts. Automaton has 35308 states and 164945 transitions. Word has length 24 [2021-10-06 16:22:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:50,891 INFO L470 AbstractCegarLoop]: Abstraction has 35308 states and 164945 transitions. [2021-10-06 16:22:50,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-10-06 16:22:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 35308 states and 164945 transitions. [2021-10-06 16:22:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 16:22:50,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:50,965 INFO L512 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:22:51,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:51,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:51,166 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:51,167 INFO L82 PathProgramCache]: Analyzing trace with hash 871528599, now seen corresponding path program 17 times [2021-10-06 16:22:51,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:51,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570921709] [2021-10-06 16:22:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:51,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:51,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:51,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570921709] [2021-10-06 16:22:51,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570921709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:51,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043660249] [2021-10-06 16:22:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:22:51,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:51,361 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:51,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-06 16:22:51,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-06 16:22:51,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-06 16:22:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:51,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043660249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:51,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:51,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-06 16:22:51,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229191592] [2021-10-06 16:22:51,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-06 16:22:51,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:51,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-06 16:22:51,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-06 16:22:51,701 INFO L87 Difference]: Start difference. First operand 35308 states and 164945 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:53,041 INFO L93 Difference]: Finished difference Result 57410 states and 267293 transitions. [2021-10-06 16:22:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 16:22:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 16:22:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:53,528 INFO L225 Difference]: With dead ends: 57410 [2021-10-06 16:22:53,528 INFO L226 Difference]: Without dead ends: 53980 [2021-10-06 16:22:53,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-06 16:22:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53980 states. [2021-10-06 16:22:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53980 to 37024. [2021-10-06 16:22:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37024 states, 37009 states have (on average 4.676078791645275) internal successors, (173057), 37023 states have internal predecessors, (173057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37024 states to 37024 states and 173057 transitions. [2021-10-06 16:22:55,687 INFO L78 Accepts]: Start accepts. Automaton has 37024 states and 173057 transitions. Word has length 25 [2021-10-06 16:22:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:22:55,688 INFO L470 AbstractCegarLoop]: Abstraction has 37024 states and 173057 transitions. [2021-10-06 16:22:55,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 37024 states and 173057 transitions. [2021-10-06 16:22:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 16:22:55,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:22:55,747 INFO L512 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2021-10-06 16:22:55,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-06 16:22:55,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:55,960 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:22:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:22:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1454287821, now seen corresponding path program 21 times [2021-10-06 16:22:55,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:22:55,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017393582] [2021-10-06 16:22:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:22:55,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:22:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:22:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:56,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:22:56,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017393582] [2021-10-06 16:22:56,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017393582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:56,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130292327] [2021-10-06 16:22:56,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:22:56,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:22:56,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:22:56,252 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:22:56,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-06 16:22:56,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-06 16:22:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:22:56,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-06 16:22:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:22:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:22:56,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130292327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:22:56,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:22:56,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-06 16:22:56,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371301903] [2021-10-06 16:22:56,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-06 16:22:56,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:22:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-06 16:22:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-06 16:22:56,606 INFO L87 Difference]: Start difference. First operand 37024 states and 173057 transitions. Second operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:22:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:22:58,138 INFO L93 Difference]: Finished difference Result 71834 states and 322437 transitions. [2021-10-06 16:22:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-06 16:22:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 16:22:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:22:58,660 INFO L225 Difference]: With dead ends: 71834 [2021-10-06 16:22:58,660 INFO L226 Difference]: Without dead ends: 67602 [2021-10-06 16:22:58,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-06 16:22:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67602 states. [2021-10-06 16:23:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67602 to 38540. [2021-10-06 16:23:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38540 states, 38525 states have (on average 4.678416612589228) internal successors, (180236), 38539 states have internal predecessors, (180236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38540 states to 38540 states and 180236 transitions. [2021-10-06 16:23:00,963 INFO L78 Accepts]: Start accepts. Automaton has 38540 states and 180236 transitions. Word has length 25 [2021-10-06 16:23:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:00,963 INFO L470 AbstractCegarLoop]: Abstraction has 38540 states and 180236 transitions. [2021-10-06 16:23:00,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 38540 states and 180236 transitions. [2021-10-06 16:23:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 16:23:00,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:00,994 INFO L512 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:23:01,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:01,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-06 16:23:01,210 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:01,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1247585072, now seen corresponding path program 18 times [2021-10-06 16:23:01,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:01,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604251384] [2021-10-06 16:23:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:01,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:01,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:01,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604251384] [2021-10-06 16:23:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604251384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:01,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303999073] [2021-10-06 16:23:01,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:23:01,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:01,972 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:02,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-06 16:23:02,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-06 16:23:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-06 16:23:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303999073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:02,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:02,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-06 16:23:02,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199739282] [2021-10-06 16:23:02,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-06 16:23:02,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-06 16:23:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-06 16:23:02,448 INFO L87 Difference]: Start difference. First operand 38540 states and 180236 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-10-06 16:23:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:03,825 INFO L93 Difference]: Finished difference Result 62766 states and 292543 transitions. [2021-10-06 16:23:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 16:23:03,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 16:23:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:04,827 INFO L225 Difference]: With dead ends: 62766 [2021-10-06 16:23:04,827 INFO L226 Difference]: Without dead ends: 58996 [2021-10-06 16:23:04,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-06 16:23:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58996 states. [2021-10-06 16:23:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58996 to 40326. [2021-10-06 16:23:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40326 states, 40311 states have (on average 4.680682692069162) internal successors, (188683), 40325 states have internal predecessors, (188683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40326 states to 40326 states and 188683 transitions. [2021-10-06 16:23:07,864 INFO L78 Accepts]: Start accepts. Automaton has 40326 states and 188683 transitions. Word has length 26 [2021-10-06 16:23:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:07,865 INFO L470 AbstractCegarLoop]: Abstraction has 40326 states and 188683 transitions. [2021-10-06 16:23:07,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-10-06 16:23:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40326 states and 188683 transitions. [2021-10-06 16:23:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 16:23:07,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:07,950 INFO L512 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-10-06 16:23:07,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:08,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-06 16:23:08,152 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2133245684, now seen corresponding path program 22 times [2021-10-06 16:23:08,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:08,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545647823] [2021-10-06 16:23:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:08,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:08,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:08,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545647823] [2021-10-06 16:23:08,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545647823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:08,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235091707] [2021-10-06 16:23:08,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:23:08,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:08,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:08,426 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:08,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-06 16:23:08,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:23:08,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:08,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-06 16:23:08,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:08,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235091707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:08,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:08,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-06 16:23:08,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595748382] [2021-10-06 16:23:08,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-06 16:23:08,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-06 16:23:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-06 16:23:08,761 INFO L87 Difference]: Start difference. First operand 40326 states and 188683 transitions. Second operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2021-10-06 16:23:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:10,308 INFO L93 Difference]: Finished difference Result 78376 states and 352130 transitions. [2021-10-06 16:23:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-06 16:23:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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 26 [2021-10-06 16:23:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:10,845 INFO L225 Difference]: With dead ends: 78376 [2021-10-06 16:23:10,846 INFO L226 Difference]: Without dead ends: 73720 [2021-10-06 16:23:10,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-06 16:23:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73720 states. [2021-10-06 16:23:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73720 to 41912. [2021-10-06 16:23:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41912 states, 41897 states have (on average 4.682841253550373) internal successors, (196197), 41911 states have internal predecessors, (196197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41912 states to 41912 states and 196197 transitions. [2021-10-06 16:23:13,839 INFO L78 Accepts]: Start accepts. Automaton has 41912 states and 196197 transitions. Word has length 26 [2021-10-06 16:23:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:13,840 INFO L470 AbstractCegarLoop]: Abstraction has 41912 states and 196197 transitions. [2021-10-06 16:23:13,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2021-10-06 16:23:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 41912 states and 196197 transitions. [2021-10-06 16:23:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-06 16:23:13,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:13,874 INFO L512 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:23:13,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:14,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-06 16:23:14,075 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash 20433847, now seen corresponding path program 19 times [2021-10-06 16:23:14,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:14,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357342046] [2021-10-06 16:23:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:14,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:14,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:14,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357342046] [2021-10-06 16:23:14,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357342046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:14,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526126094] [2021-10-06 16:23:14,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:23:14,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:14,303 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:14,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-06 16:23:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-06 16:23:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:14,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526126094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:14,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:14,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-06 16:23:14,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932526930] [2021-10-06 16:23:14,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-06 16:23:14,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-06 16:23:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-06 16:23:14,652 INFO L87 Difference]: Start difference. First operand 41912 states and 196197 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:16,117 INFO L93 Difference]: Finished difference Result 68358 states and 318919 transitions. [2021-10-06 16:23:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-06 16:23:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-06 16:23:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:16,587 INFO L225 Difference]: With dead ends: 68358 [2021-10-06 16:23:16,587 INFO L226 Difference]: Without dead ends: 64232 [2021-10-06 16:23:16,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-06 16:23:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64232 states. [2021-10-06 16:23:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64232 to 43768. [2021-10-06 16:23:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43768 states, 43753 states have (on average 4.684913034534775) internal successors, (204979), 43767 states have internal predecessors, (204979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43768 states to 43768 states and 204979 transitions. [2021-10-06 16:23:19,549 INFO L78 Accepts]: Start accepts. Automaton has 43768 states and 204979 transitions. Word has length 27 [2021-10-06 16:23:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:19,551 INFO L470 AbstractCegarLoop]: Abstraction has 43768 states and 204979 transitions. [2021-10-06 16:23:19,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 43768 states and 204979 transitions. [2021-10-06 16:23:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-06 16:23:19,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:19,601 INFO L512 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2021-10-06 16:23:19,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:19,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-06 16:23:19,814 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1706102957, now seen corresponding path program 23 times [2021-10-06 16:23:19,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:19,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728752806] [2021-10-06 16:23:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:19,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:20,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:20,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728752806] [2021-10-06 16:23:20,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728752806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:20,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260097225] [2021-10-06 16:23:20,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:23:20,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:20,149 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:20,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-06 16:23:20,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-06 16:23:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-06 16:23:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:20,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260097225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:20,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:20,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-06 16:23:20,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677193685] [2021-10-06 16:23:20,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-06 16:23:20,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-06 16:23:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-06 16:23:20,485 INFO L87 Difference]: Start difference. First operand 43768 states and 204979 transitions. Second operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:22,204 INFO L93 Difference]: Finished difference Result 85202 states and 383125 transitions. [2021-10-06 16:23:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 16:23:22,204 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-06 16:23:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:23,339 INFO L225 Difference]: With dead ends: 85202 [2021-10-06 16:23:23,340 INFO L226 Difference]: Without dead ends: 80102 [2021-10-06 16:23:23,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-06 16:23:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80102 states. [2021-10-06 16:23:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80102 to 45424. [2021-10-06 16:23:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45424 states, 45409 states have (on average 4.686912286110683) internal successors, (212828), 45423 states have internal predecessors, (212828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45424 states to 45424 states and 212828 transitions. [2021-10-06 16:23:26,018 INFO L78 Accepts]: Start accepts. Automaton has 45424 states and 212828 transitions. Word has length 27 [2021-10-06 16:23:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 45424 states and 212828 transitions. [2021-10-06 16:23:26,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 45424 states and 212828 transitions. [2021-10-06 16:23:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 16:23:26,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:26,051 INFO L512 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:23:26,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:26,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:26,252 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 633451536, now seen corresponding path program 20 times [2021-10-06 16:23:26,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:26,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371058092] [2021-10-06 16:23:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:26,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:26,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:26,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371058092] [2021-10-06 16:23:26,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371058092] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:26,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627369413] [2021-10-06 16:23:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:23:26,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:26,497 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-06 16:23:26,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:23:26,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-06 16:23:26,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:26,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627369413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:26,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:26,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-06 16:23:26,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866321958] [2021-10-06 16:23:26,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-06 16:23:26,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-06 16:23:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-06 16:23:26,859 INFO L87 Difference]: Start difference. First operand 45424 states and 212828 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:28,610 INFO L93 Difference]: Finished difference Result 74186 states and 346421 transitions. [2021-10-06 16:23:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-06 16:23:28,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-06 16:23:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:29,854 INFO L225 Difference]: With dead ends: 74186 [2021-10-06 16:23:29,854 INFO L226 Difference]: Without dead ends: 69688 [2021-10-06 16:23:29,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-06 16:23:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69688 states. [2021-10-06 16:23:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69688 to 47350. [2021-10-06 16:23:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47350 states, 47335 states have (on average 4.688813774162882) internal successors, (221945), 47349 states have internal predecessors, (221945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47350 states to 47350 states and 221945 transitions. [2021-10-06 16:23:32,569 INFO L78 Accepts]: Start accepts. Automaton has 47350 states and 221945 transitions. Word has length 28 [2021-10-06 16:23:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 47350 states and 221945 transitions. [2021-10-06 16:23:32,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 47350 states and 221945 transitions. [2021-10-06 16:23:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 16:23:32,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:32,614 INFO L512 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2021-10-06 16:23:32,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:32,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-06 16:23:32,831 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1349580308, now seen corresponding path program 24 times [2021-10-06 16:23:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:32,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105907349] [2021-10-06 16:23:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:32,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:33,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:33,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105907349] [2021-10-06 16:23:33,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105907349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:33,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708940450] [2021-10-06 16:23:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:23:33,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:33,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:33,177 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:33,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-06 16:23:33,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-06 16:23:33,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-06 16:23:33,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:33,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708940450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:33,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:33,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-06 16:23:33,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294062886] [2021-10-06 16:23:33,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-06 16:23:33,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:33,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-06 16:23:33,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-06 16:23:33,588 INFO L87 Difference]: Start difference. First operand 47350 states and 221945 transitions. Second operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-10-06 16:23:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:35,915 INFO L93 Difference]: Finished difference Result 92312 states and 415422 transitions. [2021-10-06 16:23:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-06 16:23:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 28 [2021-10-06 16:23:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:36,806 INFO L225 Difference]: With dead ends: 92312 [2021-10-06 16:23:36,806 INFO L226 Difference]: Without dead ends: 86748 [2021-10-06 16:23:36,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-06 16:23:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86748 states. [2021-10-06 16:23:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86748 to 49076. [2021-10-06 16:23:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49076 states, 49061 states have (on average 4.690670797578525) internal successors, (230129), 49075 states have internal predecessors, (230129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49076 states to 49076 states and 230129 transitions. [2021-10-06 16:23:40,148 INFO L78 Accepts]: Start accepts. Automaton has 49076 states and 230129 transitions. Word has length 28 [2021-10-06 16:23:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:40,148 INFO L470 AbstractCegarLoop]: Abstraction has 49076 states and 230129 transitions. [2021-10-06 16:23:40,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-10-06 16:23:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49076 states and 230129 transitions. [2021-10-06 16:23:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-06 16:23:40,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:40,190 INFO L512 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:23:40,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:40,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:40,395 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1837836585, now seen corresponding path program 21 times [2021-10-06 16:23:40,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:40,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100196396] [2021-10-06 16:23:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:40,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:40,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:40,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100196396] [2021-10-06 16:23:40,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100196396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:40,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829165339] [2021-10-06 16:23:40,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:23:40,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:40,662 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:40,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-06 16:23:40,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-06 16:23:40,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-06 16:23:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:41,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829165339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:41,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:41,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-06 16:23:41,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190552086] [2021-10-06 16:23:41,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-06 16:23:41,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-06 16:23:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-06 16:23:41,066 INFO L87 Difference]: Start difference. First operand 49076 states and 230129 transitions. Second operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:42,666 INFO L93 Difference]: Finished difference Result 80250 states and 375049 transitions. [2021-10-06 16:23:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-06 16:23:42,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-06 16:23:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:43,920 INFO L225 Difference]: With dead ends: 80250 [2021-10-06 16:23:43,920 INFO L226 Difference]: Without dead ends: 75364 [2021-10-06 16:23:43,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-06 16:23:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75364 states. [2021-10-06 16:23:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75364 to 51072. [2021-10-06 16:23:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51072 states, 51057 states have (on average 4.692422194801888) internal successors, (239581), 51071 states have internal predecessors, (239581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51072 states to 51072 states and 239581 transitions. [2021-10-06 16:23:47,117 INFO L78 Accepts]: Start accepts. Automaton has 51072 states and 239581 transitions. Word has length 29 [2021-10-06 16:23:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 51072 states and 239581 transitions. [2021-10-06 16:23:47,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51072 states and 239581 transitions. [2021-10-06 16:23:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-06 16:23:47,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:47,171 INFO L512 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2021-10-06 16:23:47,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:47,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:47,385 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1112687219, now seen corresponding path program 25 times [2021-10-06 16:23:47,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:47,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926977336] [2021-10-06 16:23:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:47,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:47,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:47,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926977336] [2021-10-06 16:23:47,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926977336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:47,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426521328] [2021-10-06 16:23:47,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:23:47,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:47,742 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:47,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-06 16:23:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:48,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-06 16:23:48,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:48,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426521328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:48,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:48,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-06 16:23:48,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696353512] [2021-10-06 16:23:48,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-06 16:23:48,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-06 16:23:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-06 16:23:48,142 INFO L87 Difference]: Start difference. First operand 51072 states and 239581 transitions. Second operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:49,792 INFO L93 Difference]: Finished difference Result 99706 states and 449021 transitions. [2021-10-06 16:23:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-06 16:23:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-06 16:23:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:51,470 INFO L225 Difference]: With dead ends: 99706 [2021-10-06 16:23:51,471 INFO L226 Difference]: Without dead ends: 93658 [2021-10-06 16:23:51,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-06 16:23:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93658 states. [2021-10-06 16:23:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93658 to 52868. [2021-10-06 16:23:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52868 states, 52853 states have (on average 4.694151703782189) internal successors, (248100), 52867 states have internal predecessors, (248100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52868 states to 52868 states and 248100 transitions. [2021-10-06 16:23:55,618 INFO L78 Accepts]: Start accepts. Automaton has 52868 states and 248100 transitions. Word has length 29 [2021-10-06 16:23:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:23:55,619 INFO L470 AbstractCegarLoop]: Abstraction has 52868 states and 248100 transitions. [2021-10-06 16:23:55,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52868 states and 248100 transitions. [2021-10-06 16:23:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 16:23:56,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:23:56,392 INFO L512 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:23:56,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-06 16:23:56,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:56,593 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:23:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:23:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1138357008, now seen corresponding path program 22 times [2021-10-06 16:23:56,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:23:56,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820945675] [2021-10-06 16:23:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:23:56,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:23:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:23:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:56,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:23:56,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820945675] [2021-10-06 16:23:56,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820945675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:56,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341473839] [2021-10-06 16:23:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:23:56,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:23:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:23:56,882 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:23:56,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-06 16:23:57,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:23:57,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:23:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-06 16:23:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:23:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:23:57,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341473839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:23:57,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:23:57,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-06 16:23:57,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247788232] [2021-10-06 16:23:57,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-06 16:23:57,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:23:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-06 16:23:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-06 16:23:57,295 INFO L87 Difference]: Start difference. First operand 52868 states and 248100 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:23:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:23:58,831 INFO L93 Difference]: Finished difference Result 86550 states and 404803 transitions. [2021-10-06 16:23:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-06 16:23:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-06 16:23:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:23:59,542 INFO L225 Difference]: With dead ends: 86550 [2021-10-06 16:23:59,542 INFO L226 Difference]: Without dead ends: 81260 [2021-10-06 16:23:59,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-06 16:24:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81260 states. [2021-10-06 16:24:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81260 to 54934. [2021-10-06 16:24:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54934 states, 54919 states have (on average 4.695770134197637) internal successors, (257887), 54933 states have internal predecessors, (257887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54934 states to 54934 states and 257887 transitions. [2021-10-06 16:24:02,871 INFO L78 Accepts]: Start accepts. Automaton has 54934 states and 257887 transitions. Word has length 30 [2021-10-06 16:24:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:02,872 INFO L470 AbstractCegarLoop]: Abstraction has 54934 states and 257887 transitions. [2021-10-06 16:24:02,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 54934 states and 257887 transitions. [2021-10-06 16:24:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 16:24:02,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:02,917 INFO L512 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2021-10-06 16:24:02,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:03,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:03,118 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash 133569228, now seen corresponding path program 26 times [2021-10-06 16:24:03,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:03,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894773781] [2021-10-06 16:24:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:03,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:03,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:03,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894773781] [2021-10-06 16:24:03,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894773781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:03,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826207483] [2021-10-06 16:24:03,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:24:03,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:03,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:03,507 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:03,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-06 16:24:04,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:24:04,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:24:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-06 16:24:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:04,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826207483] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:04,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:04,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-10-06 16:24:04,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115660547] [2021-10-06 16:24:04,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-06 16:24:04,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-06 16:24:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-06 16:24:04,395 INFO L87 Difference]: Start difference. First operand 54934 states and 257887 transitions. Second operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-10-06 16:24:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:24:06,211 INFO L93 Difference]: Finished difference Result 107384 states and 483922 transitions. [2021-10-06 16:24:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 16:24:06,211 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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 30 [2021-10-06 16:24:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:24:07,518 INFO L225 Difference]: With dead ends: 107384 [2021-10-06 16:24:07,519 INFO L226 Difference]: Without dead ends: 100832 [2021-10-06 16:24:07,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-06 16:24:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100832 states. [2021-10-06 16:24:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100832 to 56800. [2021-10-06 16:24:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56800 states, 56785 states have (on average 4.697384872765695) internal successors, (266741), 56799 states have internal predecessors, (266741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56800 states to 56800 states and 266741 transitions. [2021-10-06 16:24:11,452 INFO L78 Accepts]: Start accepts. Automaton has 56800 states and 266741 transitions. Word has length 30 [2021-10-06 16:24:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 56800 states and 266741 transitions. [2021-10-06 16:24:11,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-10-06 16:24:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 56800 states and 266741 transitions. [2021-10-06 16:24:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-06 16:24:11,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:11,526 INFO L512 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:24:11,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:11,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:11,727 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -929326601, now seen corresponding path program 23 times [2021-10-06 16:24:11,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:11,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259737205] [2021-10-06 16:24:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:11,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:12,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:12,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259737205] [2021-10-06 16:24:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259737205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:12,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072193272] [2021-10-06 16:24:12,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:24:12,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:12,034 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:12,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-06 16:24:12,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-06 16:24:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:24:12,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-06 16:24:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072193272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:12,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-06 16:24:12,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971904840] [2021-10-06 16:24:12,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-06 16:24:12,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:12,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-06 16:24:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-06 16:24:12,489 INFO L87 Difference]: Start difference. First operand 56800 states and 266741 transitions. Second operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:24:14,671 INFO L93 Difference]: Finished difference Result 93086 states and 435683 transitions. [2021-10-06 16:24:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-06 16:24:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-06 16:24:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:24:15,518 INFO L225 Difference]: With dead ends: 93086 [2021-10-06 16:24:15,518 INFO L226 Difference]: Without dead ends: 87376 [2021-10-06 16:24:15,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-06 16:24:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87376 states. [2021-10-06 16:24:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87376 to 58936. [2021-10-06 16:24:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58936 states, 58921 states have (on average 4.698884947641758) internal successors, (276863), 58935 states have internal predecessors, (276863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58936 states to 58936 states and 276863 transitions. [2021-10-06 16:24:19,182 INFO L78 Accepts]: Start accepts. Automaton has 58936 states and 276863 transitions. Word has length 31 [2021-10-06 16:24:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:19,183 INFO L470 AbstractCegarLoop]: Abstraction has 58936 states and 276863 transitions. [2021-10-06 16:24:19,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 58936 states and 276863 transitions. [2021-10-06 16:24:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-06 16:24:19,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:19,240 INFO L512 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2021-10-06 16:24:19,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:19,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:19,441 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash -154317421, now seen corresponding path program 27 times [2021-10-06 16:24:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:19,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654730288] [2021-10-06 16:24:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:19,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:19,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:19,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654730288] [2021-10-06 16:24:19,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654730288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:19,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869654119] [2021-10-06 16:24:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:24:19,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:19,838 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:19,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-06 16:24:20,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-06 16:24:20,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:24:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-06 16:24:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:20,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869654119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:20,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:20,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-10-06 16:24:20,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364237405] [2021-10-06 16:24:20,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-06 16:24:20,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:20,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-06 16:24:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-06 16:24:20,287 INFO L87 Difference]: Start difference. First operand 58936 states and 276863 transitions. Second operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:24:22,606 INFO L93 Difference]: Finished difference Result 115346 states and 520125 transitions. [2021-10-06 16:24:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-06 16:24:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-06 16:24:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:24:24,117 INFO L225 Difference]: With dead ends: 115346 [2021-10-06 16:24:24,118 INFO L226 Difference]: Without dead ends: 108270 [2021-10-06 16:24:24,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-06 16:24:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108270 states. [2021-10-06 16:24:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108270 to 60872. [2021-10-06 16:24:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60872 states, 60857 states have (on average 4.700396010319273) internal successors, (286052), 60871 states have internal predecessors, (286052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60872 states to 60872 states and 286052 transitions. [2021-10-06 16:24:28,095 INFO L78 Accepts]: Start accepts. Automaton has 60872 states and 286052 transitions. Word has length 31 [2021-10-06 16:24:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:28,096 INFO L470 AbstractCegarLoop]: Abstraction has 60872 states and 286052 transitions. [2021-10-06 16:24:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 60872 states and 286052 transitions. [2021-10-06 16:24:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-06 16:24:28,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:28,149 INFO L512 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:24:28,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:28,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-06 16:24:28,350 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1255648720, now seen corresponding path program 24 times [2021-10-06 16:24:28,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:28,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006183722] [2021-10-06 16:24:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:28,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:28,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:28,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006183722] [2021-10-06 16:24:28,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006183722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:28,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875902769] [2021-10-06 16:24:28,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:24:28,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:28,690 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:28,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-06 16:24:29,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-06 16:24:29,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:24:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-06 16:24:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875902769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:29,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-06 16:24:29,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234706743] [2021-10-06 16:24:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-06 16:24:29,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-06 16:24:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-06 16:24:29,154 INFO L87 Difference]: Start difference. First operand 60872 states and 286052 transitions. Second operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:24:31,343 INFO L93 Difference]: Finished difference Result 99858 states and 467689 transitions. [2021-10-06 16:24:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-06 16:24:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-06 16:24:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:24:32,216 INFO L225 Difference]: With dead ends: 99858 [2021-10-06 16:24:32,216 INFO L226 Difference]: Without dead ends: 93712 [2021-10-06 16:24:32,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-06 16:24:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93712 states. [2021-10-06 16:24:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93712 to 63078. [2021-10-06 16:24:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63078 states, 63063 states have (on average 4.701790273218845) internal successors, (296509), 63077 states have internal predecessors, (296509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63078 states to 63078 states and 296509 transitions. [2021-10-06 16:24:36,529 INFO L78 Accepts]: Start accepts. Automaton has 63078 states and 296509 transitions. Word has length 32 [2021-10-06 16:24:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:36,529 INFO L470 AbstractCegarLoop]: Abstraction has 63078 states and 296509 transitions. [2021-10-06 16:24:36,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 63078 states and 296509 transitions. [2021-10-06 16:24:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-06 16:24:36,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:36,673 INFO L512 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2021-10-06 16:24:36,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:36,874 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash -488868948, now seen corresponding path program 28 times [2021-10-06 16:24:36,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:36,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774518575] [2021-10-06 16:24:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:36,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:37,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:37,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774518575] [2021-10-06 16:24:37,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774518575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:37,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199150962] [2021-10-06 16:24:37,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:24:37,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:37,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:37,317 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:37,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-06 16:24:37,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:24:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:24:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-06 16:24:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:37,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199150962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:37,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:37,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-10-06 16:24:37,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050324155] [2021-10-06 16:24:37,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-06 16:24:37,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-06 16:24:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-06 16:24:37,787 INFO L87 Difference]: Start difference. First operand 63078 states and 296509 transitions. Second operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:24:41,039 INFO L93 Difference]: Finished difference Result 123592 states and 557630 transitions. [2021-10-06 16:24:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-06 16:24:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-06 16:24:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:24:42,750 INFO L225 Difference]: With dead ends: 123592 [2021-10-06 16:24:42,750 INFO L226 Difference]: Without dead ends: 115972 [2021-10-06 16:24:42,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-06 16:24:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115972 states. [2021-10-06 16:24:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115972 to 65084. [2021-10-06 16:24:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65084 states, 65069 states have (on average 4.7032073644900025) internal successors, (306033), 65083 states have internal predecessors, (306033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65084 states to 65084 states and 306033 transitions. [2021-10-06 16:24:47,312 INFO L78 Accepts]: Start accepts. Automaton has 65084 states and 306033 transitions. Word has length 32 [2021-10-06 16:24:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:47,312 INFO L470 AbstractCegarLoop]: Abstraction has 65084 states and 306033 transitions. [2021-10-06 16:24:47,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65084 states and 306033 transitions. [2021-10-06 16:24:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-06 16:24:47,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:47,388 INFO L512 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:24:47,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:47,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-06 16:24:47,589 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash 270406935, now seen corresponding path program 25 times [2021-10-06 16:24:47,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:47,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791911789] [2021-10-06 16:24:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:47,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:47,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:47,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791911789] [2021-10-06 16:24:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791911789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:47,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870967901] [2021-10-06 16:24:47,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:24:47,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:47,933 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:47,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-06 16:24:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-06 16:24:48,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:48,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870967901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:48,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:48,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-06 16:24:48,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281208797] [2021-10-06 16:24:48,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-06 16:24:48,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-06 16:24:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-06 16:24:48,387 INFO L87 Difference]: Start difference. First operand 65084 states and 306033 transitions. Second operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:24:50,918 INFO L93 Difference]: Finished difference Result 106866 states and 500821 transitions. [2021-10-06 16:24:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-06 16:24:50,918 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-06 16:24:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:24:51,821 INFO L225 Difference]: With dead ends: 106866 [2021-10-06 16:24:51,821 INFO L226 Difference]: Without dead ends: 100268 [2021-10-06 16:24:51,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-06 16:24:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100268 states. [2021-10-06 16:24:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100268 to 67360. [2021-10-06 16:24:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67360 states, 67345 states have (on average 4.704506644888262) internal successors, (316825), 67359 states have internal predecessors, (316825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67360 states to 67360 states and 316825 transitions. [2021-10-06 16:24:56,216 INFO L78 Accepts]: Start accepts. Automaton has 67360 states and 316825 transitions. Word has length 33 [2021-10-06 16:24:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:24:56,216 INFO L470 AbstractCegarLoop]: Abstraction has 67360 states and 316825 transitions. [2021-10-06 16:24:56,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:24:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 67360 states and 316825 transitions. [2021-10-06 16:24:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-06 16:24:56,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:24:56,302 INFO L512 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2021-10-06 16:24:56,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-06 16:24:56,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-06 16:24:56,503 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:24:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:24:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2024935603, now seen corresponding path program 29 times [2021-10-06 16:24:56,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:24:56,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685507780] [2021-10-06 16:24:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:24:56,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:24:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:24:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:56,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:24:56,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685507780] [2021-10-06 16:24:56,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685507780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:56,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120544411] [2021-10-06 16:24:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:24:56,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:24:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:24:56,953 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:24:56,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-06 16:24:57,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-06 16:24:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:24:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-06 16:24:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:24:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:24:57,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120544411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:24:57,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:24:57,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-10-06 16:24:57,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109009780] [2021-10-06 16:24:57,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-06 16:24:57,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:24:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-06 16:24:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-06 16:24:57,474 INFO L87 Difference]: Start difference. First operand 67360 states and 316825 transitions. Second operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:25:00,104 INFO L93 Difference]: Finished difference Result 132122 states and 596437 transitions. [2021-10-06 16:25:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-06 16:25:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-06 16:25:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:25:01,881 INFO L225 Difference]: With dead ends: 132122 [2021-10-06 16:25:01,881 INFO L226 Difference]: Without dead ends: 123938 [2021-10-06 16:25:01,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-06 16:25:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123938 states. [2021-10-06 16:25:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123938 to 69436. [2021-10-06 16:25:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69436 states, 69421 states have (on average 4.705838291007044) internal successors, (326684), 69435 states have internal predecessors, (326684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69436 states to 69436 states and 326684 transitions. [2021-10-06 16:25:07,120 INFO L78 Accepts]: Start accepts. Automaton has 69436 states and 326684 transitions. Word has length 33 [2021-10-06 16:25:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:25:07,121 INFO L470 AbstractCegarLoop]: Abstraction has 69436 states and 326684 transitions. [2021-10-06 16:25:07,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 69436 states and 326684 transitions. [2021-10-06 16:25:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-06 16:25:07,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:25:07,214 INFO L512 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:25:07,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-06 16:25:07,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-10-06 16:25:07,427 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:25:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:25:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash -207317328, now seen corresponding path program 26 times [2021-10-06 16:25:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:25:07,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5846032] [2021-10-06 16:25:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:25:07,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:25:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:25:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:07,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:25:07,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5846032] [2021-10-06 16:25:07,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5846032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:07,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114922864] [2021-10-06 16:25:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:25:07,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:07,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:25:07,795 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:25:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-06 16:25:08,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:25:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:25:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-06 16:25:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:25:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:08,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114922864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:08,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:25:08,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-10-06 16:25:08,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205652927] [2021-10-06 16:25:08,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-06 16:25:08,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:25:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-06 16:25:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-06 16:25:08,302 INFO L87 Difference]: Start difference. First operand 69436 states and 326684 transitions. Second operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:25:10,858 INFO L93 Difference]: Finished difference Result 114110 states and 535079 transitions. [2021-10-06 16:25:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 16:25:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-06 16:25:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:25:11,804 INFO L225 Difference]: With dead ends: 114110 [2021-10-06 16:25:11,804 INFO L226 Difference]: Without dead ends: 107044 [2021-10-06 16:25:11,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-06 16:25:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107044 states. [2021-10-06 16:25:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107044 to 71782. [2021-10-06 16:25:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71782 states, 71767 states have (on average 4.707051987682361) internal successors, (337811), 71781 states have internal predecessors, (337811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71782 states to 71782 states and 337811 transitions. [2021-10-06 16:25:16,497 INFO L78 Accepts]: Start accepts. Automaton has 71782 states and 337811 transitions. Word has length 34 [2021-10-06 16:25:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:25:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 71782 states and 337811 transitions. [2021-10-06 16:25:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 71782 states and 337811 transitions. [2021-10-06 16:25:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-06 16:25:16,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:25:16,563 INFO L512 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2021-10-06 16:25:16,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-10-06 16:25:16,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:16,767 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:25:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:25:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1651501940, now seen corresponding path program 30 times [2021-10-06 16:25:16,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:25:16,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718110484] [2021-10-06 16:25:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:25:16,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:25:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:25:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:17,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:25:17,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718110484] [2021-10-06 16:25:17,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718110484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:17,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481368214] [2021-10-06 16:25:17,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:25:17,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:17,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:25:17,238 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:25:17,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-06 16:25:17,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-10-06 16:25:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:25:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-06 16:25:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:25:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:18,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481368214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:18,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:25:18,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-06 16:25:18,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008970961] [2021-10-06 16:25:18,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-06 16:25:18,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:25:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-06 16:25:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 16:25:18,387 INFO L87 Difference]: Start difference. First operand 71782 states and 337811 transitions. Second operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:25:21,147 INFO L93 Difference]: Finished difference Result 140936 states and 636546 transitions. [2021-10-06 16:25:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-06 16:25:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-06 16:25:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:25:22,450 INFO L225 Difference]: With dead ends: 140936 [2021-10-06 16:25:22,451 INFO L226 Difference]: Without dead ends: 132168 [2021-10-06 16:25:22,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 16:25:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132168 states. [2021-10-06 16:25:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132168 to 73928. [2021-10-06 16:25:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73928 states, 73913 states have (on average 4.708305710768065) internal successors, (348005), 73927 states have internal predecessors, (348005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73928 states to 73928 states and 348005 transitions. [2021-10-06 16:25:29,476 INFO L78 Accepts]: Start accepts. Automaton has 73928 states and 348005 transitions. Word has length 34 [2021-10-06 16:25:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:25:29,477 INFO L470 AbstractCegarLoop]: Abstraction has 73928 states and 348005 transitions. [2021-10-06 16:25:29,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73928 states and 348005 transitions. [2021-10-06 16:25:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-06 16:25:29,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:25:29,696 INFO L512 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:25:29,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-06 16:25:29,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-10-06 16:25:29,910 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:25:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:25:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2131867593, now seen corresponding path program 27 times [2021-10-06 16:25:29,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:25:29,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631489709] [2021-10-06 16:25:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:25:29,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:25:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:25:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:30,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:25:30,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631489709] [2021-10-06 16:25:30,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631489709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:30,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760320618] [2021-10-06 16:25:30,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:25:30,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:30,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:25:30,380 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:25:30,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-06 16:25:30,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-06 16:25:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:25:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-06 16:25:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:25:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:30,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760320618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:30,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:25:30,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-10-06 16:25:30,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626490034] [2021-10-06 16:25:30,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-06 16:25:30,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:25:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-06 16:25:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-06 16:25:30,852 INFO L87 Difference]: Start difference. First operand 73928 states and 348005 transitions. Second operand has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:25:34,129 INFO L93 Difference]: Finished difference Result 121590 states and 570463 transitions. [2021-10-06 16:25:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-06 16:25:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-06 16:25:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:25:35,173 INFO L225 Difference]: With dead ends: 121590 [2021-10-06 16:25:35,173 INFO L226 Difference]: Without dead ends: 114040 [2021-10-06 16:25:35,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-06 16:25:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114040 states. [2021-10-06 16:25:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114040 to 76344. [2021-10-06 16:25:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76344 states, 76329 states have (on average 4.709442020726067) internal successors, (359467), 76343 states have internal predecessors, (359467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76344 states to 76344 states and 359467 transitions. [2021-10-06 16:25:40,270 INFO L78 Accepts]: Start accepts. Automaton has 76344 states and 359467 transitions. Word has length 35 [2021-10-06 16:25:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:25:40,270 INFO L470 AbstractCegarLoop]: Abstraction has 76344 states and 359467 transitions. [2021-10-06 16:25:40,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 76344 states and 359467 transitions. [2021-10-06 16:25:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-06 16:25:40,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:25:40,347 INFO L512 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2021-10-06 16:25:40,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-10-06 16:25:40,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:40,555 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:25:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:25:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 343051219, now seen corresponding path program 31 times [2021-10-06 16:25:40,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:25:40,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758908772] [2021-10-06 16:25:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:25:40,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:25:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:25:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:25:41,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758908772] [2021-10-06 16:25:41,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758908772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:41,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99435999] [2021-10-06 16:25:41,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:25:41,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:41,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:25:41,775 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:25:41,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-06 16:25:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:25:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-06 16:25:42,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:25:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:42,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99435999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:42,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:25:42,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-06 16:25:42,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002213913] [2021-10-06 16:25:42,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-06 16:25:42,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:25:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-06 16:25:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 16:25:42,276 INFO L87 Difference]: Start difference. First operand 76344 states and 359467 transitions. Second operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:25:45,131 INFO L93 Difference]: Finished difference Result 150034 states and 677957 transitions. [2021-10-06 16:25:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 16:25:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-06 16:25:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:25:47,178 INFO L225 Difference]: With dead ends: 150034 [2021-10-06 16:25:47,178 INFO L226 Difference]: Without dead ends: 140662 [2021-10-06 16:25:47,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 16:25:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140662 states. [2021-10-06 16:25:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140662 to 78560. [2021-10-06 16:25:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78560 states, 78545 states have (on average 4.710624482780571) internal successors, (369996), 78559 states have internal predecessors, (369996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78560 states to 78560 states and 369996 transitions. [2021-10-06 16:25:52,548 INFO L78 Accepts]: Start accepts. Automaton has 78560 states and 369996 transitions. Word has length 35 [2021-10-06 16:25:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:25:52,548 INFO L470 AbstractCegarLoop]: Abstraction has 78560 states and 369996 transitions. [2021-10-06 16:25:52,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 78560 states and 369996 transitions. [2021-10-06 16:25:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-06 16:25:52,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:25:52,638 INFO L512 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:25:52,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-06 16:25:52,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:52,840 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:25:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:25:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1663383664, now seen corresponding path program 28 times [2021-10-06 16:25:52,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:25:52,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509409283] [2021-10-06 16:25:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:25:52,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:25:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:25:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:53,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:25:53,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509409283] [2021-10-06 16:25:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509409283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:53,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926030962] [2021-10-06 16:25:53,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:25:53,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:25:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:25:53,260 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:25:53,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-10-06 16:25:53,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:25:53,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:25:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-06 16:25:53,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:25:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:25:53,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926030962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:25:53,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:25:53,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-10-06 16:25:53,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382678930] [2021-10-06 16:25:53,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-06 16:25:53,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:25:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-06 16:25:53,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-06 16:25:53,766 INFO L87 Difference]: Start difference. First operand 78560 states and 369996 transitions. Second operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:25:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:25:56,165 INFO L93 Difference]: Finished difference Result 129306 states and 606973 transitions. [2021-10-06 16:25:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-06 16:25:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-06 16:25:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:25:57,831 INFO L225 Difference]: With dead ends: 129306 [2021-10-06 16:25:57,831 INFO L226 Difference]: Without dead ends: 121256 [2021-10-06 16:25:57,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-06 16:25:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121256 states. [2021-10-06 16:26:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121256 to 81046. [2021-10-06 16:26:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81046 states, 81031 states have (on average 4.711690587552912) internal successors, (381793), 81045 states have internal predecessors, (381793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81046 states to 81046 states and 381793 transitions. [2021-10-06 16:26:03,145 INFO L78 Accepts]: Start accepts. Automaton has 81046 states and 381793 transitions. Word has length 36 [2021-10-06 16:26:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:26:03,145 INFO L470 AbstractCegarLoop]: Abstraction has 81046 states and 381793 transitions. [2021-10-06 16:26:03,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81046 states and 381793 transitions. [2021-10-06 16:26:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-06 16:26:03,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:26:03,232 INFO L512 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2021-10-06 16:26:03,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-10-06 16:26:03,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-10-06 16:26:03,433 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:26:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:26:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2044657004, now seen corresponding path program 32 times [2021-10-06 16:26:03,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:26:03,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027741703] [2021-10-06 16:26:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:26:03,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:26:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:26:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:04,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:26:04,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027741703] [2021-10-06 16:26:04,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027741703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:04,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315428042] [2021-10-06 16:26:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:26:04,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:04,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:26:04,606 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:26:04,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-10-06 16:26:05,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:26:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:26:05,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-06 16:26:05,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:26:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:05,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315428042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:05,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:26:05,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-10-06 16:26:05,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456394397] [2021-10-06 16:26:05,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-06 16:26:05,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:26:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-06 16:26:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-06 16:26:05,159 INFO L87 Difference]: Start difference. First operand 81046 states and 381793 transitions. Second operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:26:08,676 INFO L93 Difference]: Finished difference Result 159416 states and 720670 transitions. [2021-10-06 16:26:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 16:26:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-06 16:26:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:26:11,555 INFO L225 Difference]: With dead ends: 159416 [2021-10-06 16:26:11,555 INFO L226 Difference]: Without dead ends: 149420 [2021-10-06 16:26:11,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1089.6ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-06 16:26:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149420 states. [2021-10-06 16:26:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149420 to 83332. [2021-10-06 16:26:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83332 states, 83317 states have (on average 4.712807710311221) internal successors, (392657), 83331 states have internal predecessors, (392657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83332 states to 83332 states and 392657 transitions. [2021-10-06 16:26:17,635 INFO L78 Accepts]: Start accepts. Automaton has 83332 states and 392657 transitions. Word has length 36 [2021-10-06 16:26:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:26:17,635 INFO L470 AbstractCegarLoop]: Abstraction has 83332 states and 392657 transitions. [2021-10-06 16:26:17,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 83332 states and 392657 transitions. [2021-10-06 16:26:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-06 16:26:18,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:26:18,455 INFO L512 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:26:18,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-06 16:26:18,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:18,669 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:26:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:26:18,669 INFO L82 PathProgramCache]: Analyzing trace with hash -25283753, now seen corresponding path program 29 times [2021-10-06 16:26:18,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:26:18,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843944249] [2021-10-06 16:26:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:26:18,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:26:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:26:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:19,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:26:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843944249] [2021-10-06 16:26:19,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843944249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126596569] [2021-10-06 16:26:19,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:26:19,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:26:19,114 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:26:19,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-10-06 16:26:19,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-06 16:26:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:26:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-06 16:26:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:26:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:19,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126596569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:19,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:26:19,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-10-06 16:26:19,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759500531] [2021-10-06 16:26:19,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-06 16:26:19,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:26:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-06 16:26:19,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-06 16:26:19,810 INFO L87 Difference]: Start difference. First operand 83332 states and 392657 transitions. Second operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:26:22,642 INFO L93 Difference]: Finished difference Result 137258 states and 644609 transitions. [2021-10-06 16:26:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-06 16:26:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-06 16:26:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:26:24,469 INFO L225 Difference]: With dead ends: 137258 [2021-10-06 16:26:24,469 INFO L226 Difference]: Without dead ends: 128692 [2021-10-06 16:26:24,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-06 16:26:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128692 states. [2021-10-06 16:26:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128692 to 85888. [2021-10-06 16:26:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85888 states, 85873 states have (on average 4.713809928615514) internal successors, (404789), 85887 states have internal predecessors, (404789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85888 states to 85888 states and 404789 transitions. [2021-10-06 16:26:29,794 INFO L78 Accepts]: Start accepts. Automaton has 85888 states and 404789 transitions. Word has length 37 [2021-10-06 16:26:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:26:29,794 INFO L470 AbstractCegarLoop]: Abstraction has 85888 states and 404789 transitions. [2021-10-06 16:26:29,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 85888 states and 404789 transitions. [2021-10-06 16:26:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-06 16:26:29,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:26:29,894 INFO L512 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2021-10-06 16:26:29,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-10-06 16:26:30,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-10-06 16:26:30,095 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:26:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:26:30,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1040138509, now seen corresponding path program 33 times [2021-10-06 16:26:30,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:26:30,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596931964] [2021-10-06 16:26:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:26:30,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:26:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:26:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:30,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:26:30,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596931964] [2021-10-06 16:26:30,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596931964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:30,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956157608] [2021-10-06 16:26:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:26:30,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:26:30,624 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:26:30,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-10-06 16:26:31,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-06 16:26:31,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:26:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-06 16:26:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:26:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:31,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956157608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:31,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:26:31,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-10-06 16:26:31,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794637797] [2021-10-06 16:26:31,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-06 16:26:31,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:26:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-06 16:26:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-06 16:26:31,736 INFO L87 Difference]: Start difference. First operand 85888 states and 404789 transitions. Second operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:34,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:26:34,808 INFO L93 Difference]: Finished difference Result 169082 states and 764685 transitions. [2021-10-06 16:26:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 16:26:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-06 16:26:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:26:36,960 INFO L225 Difference]: With dead ends: 169082 [2021-10-06 16:26:36,961 INFO L226 Difference]: Without dead ends: 158442 [2021-10-06 16:26:36,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 452.1ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-06 16:26:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158442 states. [2021-10-06 16:26:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158442 to 88244. [2021-10-06 16:26:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88244 states, 88229 states have (on average 4.714866993845561) internal successors, (415988), 88243 states have internal predecessors, (415988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88244 states to 88244 states and 415988 transitions. [2021-10-06 16:26:43,381 INFO L78 Accepts]: Start accepts. Automaton has 88244 states and 415988 transitions. Word has length 37 [2021-10-06 16:26:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:26:43,382 INFO L470 AbstractCegarLoop]: Abstraction has 88244 states and 415988 transitions. [2021-10-06 16:26:43,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 88244 states and 415988 transitions. [2021-10-06 16:26:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-06 16:26:43,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:26:43,495 INFO L512 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:26:43,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-10-06 16:26:43,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:43,710 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:26:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:26:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash -783794064, now seen corresponding path program 30 times [2021-10-06 16:26:43,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:26:43,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754741253] [2021-10-06 16:26:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:26:43,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:26:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:26:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:44,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:26:44,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754741253] [2021-10-06 16:26:44,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754741253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:44,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63356983] [2021-10-06 16:26:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:26:44,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:26:44,180 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:26:44,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-10-06 16:26:44,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-10-06 16:26:44,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:26:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-06 16:26:44,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:26:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:44,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63356983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:44,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:26:44,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-06 16:26:44,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284613403] [2021-10-06 16:26:44,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-06 16:26:44,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:26:44,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-06 16:26:44,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 16:26:44,755 INFO L87 Difference]: Start difference. First operand 88244 states and 415988 transitions. Second operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:26:47,911 INFO L93 Difference]: Finished difference Result 145446 states and 683371 transitions. [2021-10-06 16:26:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-06 16:26:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-06 16:26:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:26:49,152 INFO L225 Difference]: With dead ends: 145446 [2021-10-06 16:26:49,152 INFO L226 Difference]: Without dead ends: 136348 [2021-10-06 16:26:49,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 16:26:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136348 states. [2021-10-06 16:26:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136348 to 90870. [2021-10-06 16:26:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90870 states, 90855 states have (on average 4.715810907489956) internal successors, (428455), 90869 states have internal predecessors, (428455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90870 states to 90870 states and 428455 transitions. [2021-10-06 16:26:57,272 INFO L78 Accepts]: Start accepts. Automaton has 90870 states and 428455 transitions. Word has length 38 [2021-10-06 16:26:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:26:57,274 INFO L470 AbstractCegarLoop]: Abstraction has 90870 states and 428455 transitions. [2021-10-06 16:26:57,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:26:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 90870 states and 428455 transitions. [2021-10-06 16:26:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-06 16:26:57,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:26:57,487 INFO L512 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2021-10-06 16:26:57,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-10-06 16:26:57,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-10-06 16:26:57,700 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:26:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:26:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2115448396, now seen corresponding path program 34 times [2021-10-06 16:26:57,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:26:57,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996340391] [2021-10-06 16:26:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:26:57,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:26:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:26:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:58,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:26:58,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996340391] [2021-10-06 16:26:58,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996340391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:58,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107363727] [2021-10-06 16:26:58,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:26:58,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:26:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:26:58,279 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:26:58,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-10-06 16:26:58,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:26:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:26:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-06 16:26:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:26:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:26:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107363727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:26:58,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:26:58,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-10-06 16:26:58,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478407470] [2021-10-06 16:26:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-06 16:26:58,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:26:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-06 16:26:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 16:26:58,846 INFO L87 Difference]: Start difference. First operand 90870 states and 428455 transitions. Second operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:27:02,354 INFO L93 Difference]: Finished difference Result 179032 states and 810002 transitions. [2021-10-06 16:27:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 16:27:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-06 16:27:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:27:04,382 INFO L225 Difference]: With dead ends: 179032 [2021-10-06 16:27:04,382 INFO L226 Difference]: Without dead ends: 167728 [2021-10-06 16:27:04,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 16:27:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167728 states. [2021-10-06 16:27:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167728 to 93296. [2021-10-06 16:27:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93296 states, 93281 states have (on average 4.716812641373913) internal successors, (439989), 93295 states have internal predecessors, (439989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93296 states to 93296 states and 439989 transitions. [2021-10-06 16:27:10,906 INFO L78 Accepts]: Start accepts. Automaton has 93296 states and 439989 transitions. Word has length 38 [2021-10-06 16:27:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:27:10,906 INFO L470 AbstractCegarLoop]: Abstraction has 93296 states and 439989 transitions. [2021-10-06 16:27:10,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 93296 states and 439989 transitions. [2021-10-06 16:27:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-06 16:27:11,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:27:11,000 INFO L512 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:27:11,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-10-06 16:27:11,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-10-06 16:27:11,201 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:27:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:27:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1472190071, now seen corresponding path program 31 times [2021-10-06 16:27:11,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:27:11,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055831554] [2021-10-06 16:27:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:27:11,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:27:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:27:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:12,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:27:12,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055831554] [2021-10-06 16:27:12,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055831554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:12,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197708152] [2021-10-06 16:27:12,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:27:12,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:27:12,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:27:12,262 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:27:12,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-10-06 16:27:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:27:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-06 16:27:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:27:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197708152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:12,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:27:12,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-06 16:27:12,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786030448] [2021-10-06 16:27:12,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-06 16:27:12,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:27:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-06 16:27:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 16:27:12,837 INFO L87 Difference]: Start difference. First operand 93296 states and 439989 transitions. Second operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:27:15,480 INFO L93 Difference]: Finished difference Result 153870 states and 723259 transitions. [2021-10-06 16:27:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 16:27:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-06 16:27:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:27:17,204 INFO L225 Difference]: With dead ends: 153870 [2021-10-06 16:27:17,204 INFO L226 Difference]: Without dead ends: 144224 [2021-10-06 16:27:17,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 985.5ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 16:27:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144224 states. [2021-10-06 16:27:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144224 to 95992. [2021-10-06 16:27:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95992 states, 95977 states have (on average 4.717703199724934) internal successors, (452791), 95991 states have internal predecessors, (452791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95992 states to 95992 states and 452791 transitions. [2021-10-06 16:27:23,288 INFO L78 Accepts]: Start accepts. Automaton has 95992 states and 452791 transitions. Word has length 39 [2021-10-06 16:27:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:27:23,288 INFO L470 AbstractCegarLoop]: Abstraction has 95992 states and 452791 transitions. [2021-10-06 16:27:23,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 95992 states and 452791 transitions. [2021-10-06 16:27:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-06 16:27:23,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:27:23,396 INFO L512 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2021-10-06 16:27:23,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-10-06 16:27:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:27:23,597 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:27:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:27:23,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1154394643, now seen corresponding path program 35 times [2021-10-06 16:27:23,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:27:23,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011696588] [2021-10-06 16:27:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:27:23,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:27:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:27:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:24,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:27:24,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011696588] [2021-10-06 16:27:24,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011696588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:24,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991837261] [2021-10-06 16:27:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:27:24,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:27:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:27:24,200 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:27:24,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-10-06 16:27:24,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-06 16:27:24,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:27:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-06 16:27:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:27:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:24,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991837261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:24,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:27:24,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-10-06 16:27:24,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21216171] [2021-10-06 16:27:24,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-06 16:27:24,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:27:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-06 16:27:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 16:27:24,793 INFO L87 Difference]: Start difference. First operand 95992 states and 452791 transitions. Second operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:27:28,367 INFO L93 Difference]: Finished difference Result 189266 states and 856621 transitions. [2021-10-06 16:27:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 16:27:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-06 16:27:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:27:31,134 INFO L225 Difference]: With dead ends: 189266 [2021-10-06 16:27:31,135 INFO L226 Difference]: Without dead ends: 177278 [2021-10-06 16:27:31,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 16:27:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177278 states. [2021-10-06 16:27:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177278 to 98488. [2021-10-06 16:27:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98488 states, 98473 states have (on average 4.718653844200949) internal successors, (464660), 98487 states have internal predecessors, (464660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98488 states to 98488 states and 464660 transitions. [2021-10-06 16:27:40,925 INFO L78 Accepts]: Start accepts. Automaton has 98488 states and 464660 transitions. Word has length 39 [2021-10-06 16:27:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:27:40,925 INFO L470 AbstractCegarLoop]: Abstraction has 98488 states and 464660 transitions. [2021-10-06 16:27:40,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:40,925 INFO L276 IsEmpty]: Start isEmpty. Operand 98488 states and 464660 transitions. [2021-10-06 16:27:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-06 16:27:41,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:27:41,046 INFO L512 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:27:41,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-10-06 16:27:41,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:27:41,247 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:27:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:27:41,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1606745776, now seen corresponding path program 32 times [2021-10-06 16:27:41,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:27:41,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348937484] [2021-10-06 16:27:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:27:41,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:27:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:27:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:41,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:27:41,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348937484] [2021-10-06 16:27:41,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348937484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:41,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131273076] [2021-10-06 16:27:41,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:27:41,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:27:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:27:41,746 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:27:41,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-10-06 16:27:42,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:27:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:27:42,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-06 16:27:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:27:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:42,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131273076] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:42,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:27:42,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-10-06 16:27:42,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307727618] [2021-10-06 16:27:42,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-06 16:27:42,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:27:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-06 16:27:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-06 16:27:42,340 INFO L87 Difference]: Start difference. First operand 98488 states and 464660 transitions. Second operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:27:45,638 INFO L93 Difference]: Finished difference Result 162530 states and 764273 transitions. [2021-10-06 16:27:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 16:27:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-06 16:27:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:27:47,454 INFO L225 Difference]: With dead ends: 162530 [2021-10-06 16:27:47,454 INFO L226 Difference]: Without dead ends: 152320 [2021-10-06 16:27:47,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-06 16:27:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152320 states. [2021-10-06 16:27:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152320 to 101254. [2021-10-06 16:27:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101254 states, 101239 states have (on average 4.719495451357679) internal successors, (477797), 101253 states have internal predecessors, (477797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101254 states to 101254 states and 477797 transitions. [2021-10-06 16:27:53,693 INFO L78 Accepts]: Start accepts. Automaton has 101254 states and 477797 transitions. Word has length 40 [2021-10-06 16:27:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:27:53,698 INFO L470 AbstractCegarLoop]: Abstraction has 101254 states and 477797 transitions. [2021-10-06 16:27:53,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 101254 states and 477797 transitions. [2021-10-06 16:27:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-06 16:27:53,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:27:53,821 INFO L512 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2021-10-06 16:27:53,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-10-06 16:27:54,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-10-06 16:27:54,022 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:27:54,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:27:54,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1426499372, now seen corresponding path program 36 times [2021-10-06 16:27:54,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:27:54,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013375950] [2021-10-06 16:27:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:27:54,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:27:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:27:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:54,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:27:54,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013375950] [2021-10-06 16:27:54,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013375950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:54,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954216925] [2021-10-06 16:27:54,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 16:27:54,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:27:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:27:54,745 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:27:54,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-10-06 16:27:55,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-06 16:27:55,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:27:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-06 16:27:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:27:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:27:55,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954216925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:27:55,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:27:55,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-06 16:27:55,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4306030] [2021-10-06 16:27:55,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-06 16:27:55,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:27:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-06 16:27:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 16:27:55,396 INFO L87 Difference]: Start difference. First operand 101254 states and 477797 transitions. Second operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:27:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:27:59,579 INFO L93 Difference]: Finished difference Result 199784 states and 904542 transitions. [2021-10-06 16:27:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-06 16:27:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-06 16:27:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:28:01,222 INFO L225 Difference]: With dead ends: 199784 [2021-10-06 16:28:01,222 INFO L226 Difference]: Without dead ends: 187092 [2021-10-06 16:28:01,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 638.2ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 16:28:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187092 states. [2021-10-06 16:28:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187092 to 103820. [2021-10-06 16:28:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103820 states, 103805 states have (on average 4.7203988247194255) internal successors, (490001), 103819 states have internal predecessors, (490001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103820 states to 103820 states and 490001 transitions. [2021-10-06 16:28:09,792 INFO L78 Accepts]: Start accepts. Automaton has 103820 states and 490001 transitions. Word has length 40 [2021-10-06 16:28:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:28:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 103820 states and 490001 transitions. [2021-10-06 16:28:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 103820 states and 490001 transitions. [2021-10-06 16:28:10,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-06 16:28:10,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:28:10,000 INFO L512 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:28:10,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-10-06 16:28:10,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:28:10,215 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:28:10,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:28:10,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1730490775, now seen corresponding path program 33 times [2021-10-06 16:28:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:28:10,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831719544] [2021-10-06 16:28:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:28:10,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:28:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:28:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:28:10,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:28:10,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831719544] [2021-10-06 16:28:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831719544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:28:10,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148169296] [2021-10-06 16:28:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:28:10,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:28:10,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:28:10,802 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:28:10,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-06 16:28:11,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-06 16:28:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:28:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-06 16:28:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:28:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:28:11,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148169296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:28:11,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:28:11,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-10-06 16:28:11,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715370600] [2021-10-06 16:28:11,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-06 16:28:11,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:28:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-06 16:28:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-06 16:28:11,428 INFO L87 Difference]: Start difference. First operand 103820 states and 490001 transitions. Second operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:28:15,812 INFO L93 Difference]: Finished difference Result 171426 states and 806413 transitions. [2021-10-06 16:28:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 16:28:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-06 16:28:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:28:18,270 INFO L225 Difference]: With dead ends: 171426 [2021-10-06 16:28:18,271 INFO L226 Difference]: Without dead ends: 160636 [2021-10-06 16:28:18,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-06 16:28:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160636 states. [2021-10-06 16:28:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160636 to 106656. [2021-10-06 16:28:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106656 states, 106641 states have (on average 4.721195412646168) internal successors, (503473), 106655 states have internal predecessors, (503473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106656 states to 106656 states and 503473 transitions. [2021-10-06 16:28:26,384 INFO L78 Accepts]: Start accepts. Automaton has 106656 states and 503473 transitions. Word has length 41 [2021-10-06 16:28:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:28:26,384 INFO L470 AbstractCegarLoop]: Abstraction has 106656 states and 503473 transitions. [2021-10-06 16:28:26,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 106656 states and 503473 transitions. [2021-10-06 16:28:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-06 16:28:26,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:28:26,523 INFO L512 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2021-10-06 16:28:26,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-10-06 16:28:26,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:28:26,736 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:28:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:28:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1271811379, now seen corresponding path program 37 times [2021-10-06 16:28:26,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:28:26,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941476720] [2021-10-06 16:28:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:28:26,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:28:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:28:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:28:27,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:28:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941476720] [2021-10-06 16:28:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941476720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:28:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177777311] [2021-10-06 16:28:27,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 16:28:27,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:28:27,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:28:27,380 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:28:27,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-06 16:28:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:28:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-06 16:28:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:28:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:28:28,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177777311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:28:28,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:28:28,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-10-06 16:28:28,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188409427] [2021-10-06 16:28:28,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-06 16:28:28,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:28:28,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-06 16:28:28,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 16:28:28,004 INFO L87 Difference]: Start difference. First operand 106656 states and 503473 transitions. Second operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:28:32,334 INFO L93 Difference]: Finished difference Result 210586 states and 953765 transitions. [2021-10-06 16:28:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 16:28:32,334 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-06 16:28:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:28:34,212 INFO L225 Difference]: With dead ends: 210586 [2021-10-06 16:28:34,212 INFO L226 Difference]: Without dead ends: 197170 [2021-10-06 16:28:34,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 16:28:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197170 states. [2021-10-06 16:28:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197170 to 109292. [2021-10-06 16:28:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109292 states, 109277 states have (on average 4.722054961245275) internal successors, (516012), 109291 states have internal predecessors, (516012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109292 states to 109292 states and 516012 transitions. [2021-10-06 16:28:43,309 INFO L78 Accepts]: Start accepts. Automaton has 109292 states and 516012 transitions. Word has length 41 [2021-10-06 16:28:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:28:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 109292 states and 516012 transitions. [2021-10-06 16:28:43,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 109292 states and 516012 transitions. [2021-10-06 16:28:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-06 16:28:43,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:28:43,550 INFO L512 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:28:43,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-10-06 16:28:43,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:28:43,766 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:28:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:28:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2105608752, now seen corresponding path program 34 times [2021-10-06 16:28:43,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:28:43,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434730047] [2021-10-06 16:28:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:28:43,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:28:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:28:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:28:44,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:28:44,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434730047] [2021-10-06 16:28:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434730047] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:28:44,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086822219] [2021-10-06 16:28:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 16:28:44,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:28:44,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:28:44,457 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:28:44,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-06 16:28:45,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 16:28:45,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:28:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-06 16:28:45,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:28:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:28:45,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086822219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:28:45,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:28:45,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-10-06 16:28:45,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546400772] [2021-10-06 16:28:45,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-06 16:28:45,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:28:45,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-06 16:28:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 16:28:45,736 INFO L87 Difference]: Start difference. First operand 109292 states and 516012 transitions. Second operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:28:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:28:50,621 INFO L93 Difference]: Finished difference Result 180558 states and 849679 transitions. [2021-10-06 16:28:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 16:28:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-06 16:28:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:28:53,109 INFO L225 Difference]: With dead ends: 180558 [2021-10-06 16:28:53,109 INFO L226 Difference]: Without dead ends: 169172 [2021-10-06 16:28:53,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 16:28:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169172 states. [2021-10-06 16:28:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169172 to 112198. [2021-10-06 16:29:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112198 states, 112183 states have (on average 4.722810051433818) internal successors, (529819), 112197 states have internal predecessors, (529819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112198 states to 112198 states and 529819 transitions. [2021-10-06 16:29:02,369 INFO L78 Accepts]: Start accepts. Automaton has 112198 states and 529819 transitions. Word has length 42 [2021-10-06 16:29:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:29:02,372 INFO L470 AbstractCegarLoop]: Abstraction has 112198 states and 529819 transitions. [2021-10-06 16:29:02,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 112198 states and 529819 transitions. [2021-10-06 16:29:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-06 16:29:02,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:29:02,646 INFO L512 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2021-10-06 16:29:02,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-06 16:29:02,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:29:02,861 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:29:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:29:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash 771450892, now seen corresponding path program 38 times [2021-10-06 16:29:02,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:29:02,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780276983] [2021-10-06 16:29:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:29:02,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:29:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:29:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:29:03,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:29:03,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780276983] [2021-10-06 16:29:03,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780276983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:29:03,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897240176] [2021-10-06 16:29:03,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 16:29:03,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:29:03,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:29:03,618 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:29:03,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-06 16:29:04,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 16:29:04,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:29:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-06 16:29:04,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:29:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:29:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897240176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:29:04,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:29:04,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-10-06 16:29:04,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752033857] [2021-10-06 16:29:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-06 16:29:04,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:29:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-06 16:29:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-06 16:29:04,219 INFO L87 Difference]: Start difference. First operand 112198 states and 529819 transitions. Second operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:29:10,268 INFO L93 Difference]: Finished difference Result 221672 states and 1004290 transitions. [2021-10-06 16:29:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-06 16:29:10,268 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-06 16:29:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:29:13,599 INFO L225 Difference]: With dead ends: 221672 [2021-10-06 16:29:13,599 INFO L226 Difference]: Without dead ends: 207512 [2021-10-06 16:29:13,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-06 16:29:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207512 states. [2021-10-06 16:29:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207512 to 114904. [2021-10-06 16:29:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114904 states, 114889 states have (on average 4.723628893975925) internal successors, (542693), 114903 states have internal predecessors, (542693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114904 states to 114904 states and 542693 transitions. [2021-10-06 16:29:22,591 INFO L78 Accepts]: Start accepts. Automaton has 114904 states and 542693 transitions. Word has length 42 [2021-10-06 16:29:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:29:22,591 INFO L470 AbstractCegarLoop]: Abstraction has 114904 states and 542693 transitions. [2021-10-06 16:29:22,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 114904 states and 542693 transitions. [2021-10-06 16:29:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-06 16:29:22,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:29:22,746 INFO L512 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 16:29:22,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-10-06 16:29:22,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:29:22,947 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:29:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:29:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 849364151, now seen corresponding path program 35 times [2021-10-06 16:29:22,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:29:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310885909] [2021-10-06 16:29:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:29:22,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:29:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:29:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:29:23,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:29:23,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310885909] [2021-10-06 16:29:23,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310885909] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:29:23,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321015529] [2021-10-06 16:29:23,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 16:29:23,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:29:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:29:23,553 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:29:23,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-06 16:29:24,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-06 16:29:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:29:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-06 16:29:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:29:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:29:24,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321015529] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:29:24,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:29:24,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-10-06 16:29:24,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445531812] [2021-10-06 16:29:24,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-06 16:29:24,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:29:24,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-06 16:29:24,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 16:29:24,228 INFO L87 Difference]: Start difference. First operand 114904 states and 542693 transitions. Second operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 16:29:27,834 INFO L93 Difference]: Finished difference Result 189926 states and 894071 transitions. [2021-10-06 16:29:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 16:29:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-06 16:29:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 16:29:30,558 INFO L225 Difference]: With dead ends: 189926 [2021-10-06 16:29:30,558 INFO L226 Difference]: Without dead ends: 177928 [2021-10-06 16:29:30,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 16:29:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177928 states. [2021-10-06 16:29:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177928 to 117880. [2021-10-06 16:29:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117880 states, 117865 states have (on average 4.72434564968396) internal successors, (556835), 117879 states have internal predecessors, (556835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117880 states to 117880 states and 556835 transitions. [2021-10-06 16:29:41,512 INFO L78 Accepts]: Start accepts. Automaton has 117880 states and 556835 transitions. Word has length 43 [2021-10-06 16:29:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 16:29:41,512 INFO L470 AbstractCegarLoop]: Abstraction has 117880 states and 556835 transitions. [2021-10-06 16:29:41,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 16:29:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 117880 states and 556835 transitions. [2021-10-06 16:29:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-06 16:29:41,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 16:29:41,755 INFO L512 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2021-10-06 16:29:41,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-06 16:29:41,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-10-06 16:29:41,956 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2021-10-06 16:29:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 16:29:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1854822317, now seen corresponding path program 39 times [2021-10-06 16:29:41,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-06 16:29:41,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801003955] [2021-10-06 16:29:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 16:29:41,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-06 16:29:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 16:29:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:29:42,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-06 16:29:42,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801003955] [2021-10-06 16:29:42,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801003955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:29:42,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177903652] [2021-10-06 16:29:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 16:29:42,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:29:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 16:29:42,698 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-06 16:29:42,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-06 16:29:43,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-10-06 16:29:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 16:29:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-06 16:29:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 16:29:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 16:29:43,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177903652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-06 16:29:43,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 16:29:43,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-10-06 16:29:43,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650243169] [2021-10-06 16:29:43,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-06 16:29:43,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-06 16:29:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-06 16:29:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-06 16:29:43,402 INFO L87 Difference]: Start difference. First operand 117880 states and 556835 transitions. Second operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-06 16:29:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-06 16:29:48,086 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,102 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-06 16:29:48,102 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-06 16:29:48,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-10-06 16:29:48,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-06 16:29:48,289 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). [2021-10-06 16:29:48,291 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,292 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,292 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,292 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,292 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,292 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,293 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,293 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,293 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,293 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,293 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,293 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-06 16:29:48,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-06 16:29:48,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-06 16:29:48,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-06 16:29:48,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,295 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,297 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,297 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,297 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-06 16:29:48,305 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-06 16:29:48,305 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-06 16:29:48,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.10 04:29:48 BasicIcfg [2021-10-06 16:29:48,307 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-06 16:29:48,307 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.witnessprinter [2021-10-06 16:29:48,309 INFO L168 Benchmark]: Toolchain (without parser) took 529381.16 ms. Allocated memory was 154.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 128.6 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-10-06 16:29:48,309 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-06 16:29:48,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.07 ms. Allocated memory is still 154.1 MB. Free memory was 128.4 MB in the beginning and 117.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-06 16:29:48,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.57 ms. Allocated memory is still 154.1 MB. Free memory was 117.3 MB in the beginning and 115.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-06 16:29:48,311 INFO L168 Benchmark]: Boogie Preprocessor took 75.50 ms. Allocated memory is still 154.1 MB. Free memory was 115.6 MB in the beginning and 114.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-06 16:29:48,311 INFO L168 Benchmark]: RCFGBuilder took 1072.28 ms. Allocated memory is still 154.1 MB. Free memory was 114.2 MB in the beginning and 126.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-10-06 16:29:48,311 INFO L168 Benchmark]: TraceAbstraction took 527827.27 ms. Allocated memory was 154.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 125.8 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-10-06 16:29:48,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.07 ms. Allocated memory is still 154.1 MB. Free memory was 128.4 MB in the beginning and 117.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 87.57 ms. Allocated memory is still 154.1 MB. Free memory was 117.3 MB in the beginning and 115.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.50 ms. Allocated memory is still 154.1 MB. Free memory was 115.6 MB in the beginning and 114.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1072.28 ms. Allocated memory is still 154.1 MB. Free memory was 114.2 MB in the beginning and 126.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 527827.27 ms. Allocated memory was 154.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 125.8 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5643.8ms, 142 PlacesBefore, 58 PlacesAfterwards, 138 TransitionsBefore, 49 TransitionsAfterwards, 4680 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 8 ConcurrentYvCompositions, 5 ChoiceCompositions, 123 TotalNumberOfCompositions, 5934 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5562, positive: 5545, positive conditional: 0, positive unconditional: 5545, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2861, positive: 2851, positive conditional: 0, positive unconditional: 2851, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2861, positive: 2848, positive conditional: 0, positive unconditional: 2848, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 73, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 55, negative conditional: 0, negative unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5562, positive: 2694, positive conditional: 0, positive unconditional: 2694, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 2861, unknown conditional: 0, unknown unconditional: 2861] , Statistics on independence cache: Total cache size (in pairs): 224, Positive cache size: 224, Positive conditional cache size: 0, Positive unconditional cache size: 224, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (117880states) and FLOYD_HOARE automaton (currently 42 states, 43 states before enhancement),while ReachableStatesComputation was computing reachable states (211993 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 190 locations, 36 error locations. Started 1 CEGAR loops. OverallTime: 527535.5ms, OverallIterations: 90, TraceHistogramMax: 39, EmptinessCheckTime: 5729.0ms, AutomataDifference: 199076.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6047.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4231 SDtfs, 96597 SDslu, 36995 SDs, 0 SdLazy, 3933 SolverSat, 4931 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5510.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3352 GetRequests, 1760 SyntacticMatches, 0 SemanticMatches, 1592 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 18325.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=117880occurred in iteration=89, InterpolantAutomatonStates: 1646, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 245143.1ms AutomataMinimizationTime, 89 MinimizatonAttempts, 2118080 StatesRemovedByMinimization, 88 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 941.7ms SsaConstructionTime, 4733.2ms SatisfiabilityAnalysisTime, 29658.3ms InterpolantComputationTime, 3887 NumberOfCodeBlocks, 3881 NumberOfCodeBlocksAsserted, 565 NumberOfCheckSat, 3715 ConstructedInterpolants, 0 QuantifiedInterpolants, 10999 SizeOfPredicates, 0 NumberOfNonLiveVariables, 19172 ConjunctsInSsa, 1664 ConjunctsInUnsatCore, 172 InterpolantComputations, 14 PerfectInterpolantSequences, 23/36897 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown